Project background:
The previous owner of my condo had installed a cabinet/desk unit into the main closet of a loft-style condo. I needed to recover this closet space. The rest of the unit has bi-fold doors, which worked great but would be difficult to match the wood. The opening is 81" high x 96" wide.
Door selection:
Conventional hardware stores only had basic doors. Their bifold door selection consisted of louvered and oak wood styles, which wouldn't fit the style of my place. Their special order selection wasn't much better. Modifying conventional doors would have required going section sliding or special ordering 48" doors. Both options required special hardware. A search of the internet revealed expensive door options all in the $1000 - 2000 neighborhood.
A stop into ikea revealed 2 options in the PAX lineup - The PAX Lyngdal (and similar doors) and a smaller set ( I forget the name...something weird and swedish). Both potions were front mount (as opposed to mounting to the ceiling of the unit) and could be purchased w/o the cabinet. The Lyngdal units come in a number of sizes and were large enough for my opening.
The units were $500. I was in Ikea for about 3 hours measuring, pondering, and figuring before I made the go-ahead call. My condo has 93 different types of wood in it. I decided to stay away from the birch models and go for a metal/glass unit. For my 81x 96 inch opening, I bought a 93 x 98' model, which will give me a little top overhang.
Installation
The first step is to mount the frame. The most (only) important piece is the top mount. It is designed to mount on the top front of a PAX unit. The top mount has a 1" wide lip, which will need to be removed in order to mount the mount flush with the drywall. Time to break out hacksaw (or sheet metal break, cutoff wheel, etc). Plan to spend about 1-2 hours doing this.
(mount is upside down. Hacksaw is on the wall facing side)
Don't worry about the marks, you'll never see them.
Once this lip is removed, I drilled 10 1/4" holes (or the same size as your screw you want to mount the frame with) into the top mount for the bolts which will secure it. The bolts are required because we no longer have the top lip and pax frame to support the weight of the doors. They also position the mounts. Mechanical engineers won't like the bolts holding the unit and positioning it, sorry. Once this is done, the unit is tacked up so we can test fit it, center it, level it, and ensure it is at the right height with a piece of the door frame with the wheel installed.
Tip: assemble one side of the door to test fit it.
Tip: Align the mount in the center opening with the joining of the mount sides rather than trying to figure out if you're equi-distant from the closets sides on both ends. It will save you a big headache. Measure roughly opening width /2 on both ends, mark it, call the center of the opening 1/2 way between your two marks.
Tip: if you use toggle bolts. Mount the frame a 1/4" higher than you plan on because the toggle bolts will require a larger hole than the bolt to push the toggle through. The bolt will sit on the bottom of that hole.
Now that the unit is tacked up, level, and at the correct height, you'll note that the door stops have a bolt holding them on. This bolt is preventing the unit from sitting flush with the wall. Take a hammer and tap the door stops into the wall. This will mark their position in the drywall. Remove the mount and drill a 3/8" hole where the marks are in the wall from the door stop bolts.
Re-mount the mount to the wall. Make sure it's level. If it's not, widen the door stop holes with the drill and realign the mount. Push the mount flush with the wall. Remove your tack nails 1 by 1 and drill a 1/4" hole (or what ever you drilled above) through holes in the frame. Once the hole drilled, put screw in the hole to hold the frame. As you go, recheck that the mount is level and the door frame still fits right. Remove the frame.
Now widen the holes you drilled to accept the anchors. I used a toggle which required a 1/2" bit. I only had a 3/8" so I drilled those and widened them with the drill. Check the opening you make with one of your bolts.
Pre-insert the bolts and anchors into the frame.
Now mount the frame to the wall. Push the bolts through the wall and tighten. Then assemble a door, and fit it.
I'll post the rest once I complete it.