This way I don't have to take any of the interior apart (well ok, I did have to remove the shift knob). I left the boot, carpet, etc. all intact. Once the engine was in the mounts (I rebuilt the motor too) and had the tranny/t-case mounted on the jack. It took me all of maybe 5 minutes to get them mated to the engine dowel pins and all the bellhousing bolts started and torqued down. It took me a few more minutes to get a jack stand to hold the t-case up when I removed the hybrid tranny jack, so I could bolt the crossmember in place. I have used the cherry picker through the shifter hole method before, but it CAN be awkward. Plus it takes too much time with one person. If it is not at the right height, you have to get out and lift/lower the picker, try to manuever it, tilt it etc. With the modified tranny jack, you can lift, tilt, and manuever it all with one hand without having to physically move. I've done it with a regular floor jack too with ratchet straps, and also have done it by muscling the tranny in first and then the t-case in by hand on another vehicle and between all the methods this was the quickest, cleanest, and easiest install. I am in the process of building a similar apparatus for my floor jack (I hate having to alway borrow tools) because it IS that much easier (Definitely worth the time it takes to build and scrap metal is cheap).
As far as anything being in the way, the jack is only under there just long enough to get the assembly bolted to the motor. Then there is a jack/jackstand in the way for another 10 minutes while you bolt the crossmember in place and then you can remove it and nothing is in the way. Plus it's skinny enough that it isn't in the way when trying to start/tighten the bellhousing bolts.
See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot>http://coloradok5.com/gallery/Leadfoot</a>