Yea, I did mention the oversize bits in one of my other posts but a lot of folks just skim right over that. The issues with the oversize bits are several incase you dont own any.
1. They are pricy
2. they dont provide much wiggle room I need to tap in 8mm dowels into 8mm holes but its humid where I am so that could be partly to blame. The oversize bits dont do a whole lot the dowels are still snug but go in/out with fingers. It still doesnt do much for wiggle room. I also only tried the over sized bits on one half of the joint since the face drilling is done on CNC Perhaps if both sides were drilled with oversized bit it would make more of a difference.
3. The oversize bits increase the entire hole size which could make the one edge misalign as well. The double plunge method maintains a consistent distance between the fence reference edge and dowel.
I had the LR32 prior to the DDF and got really good and fast results with it so I never bothered with the DDF but can see how having just one machine for all would be a big benefit for some.
As far as renting Festools here in the USA thats a no go. I have never seen anyone renting Festool.
Actually there was a dealer here based around Atlanta who did rent Festool's. Also had a rent to purchase type deal. Recently it was posted here that his products were being offered at a discount, so I assume that to mean he will no longer be a dealer.
Peter