(10-15-2020, 09:41 PM)abernat Wrote: I have one and like it a lot. One important piece, though, is that your router table insert (the piece that holds a bushing) needs to be totally rigid. On my table it can shift back and forth under pressure, which means the dovetails end up loose.

(10-16-2020, 09:41 AM)Tony Z Wrote: I've had one since it first came out.  It has never been used until this week, and in fact I tried selling it, but had no takers.  I have hand cut my dovetails for a dozen and a half years, however, my arthritis (which is why I bought the jig in the first place) in my hands is worsening and to the point that chisel work has me in very bad pain.

I am building a desk for one of my daughters, and all drawers had hand-cut dovetails.  I have the case carcass that also needed dovetails.  Since all of these show, I want them perfect, and my practice cuts were lacking a bit.  Hence I dug our the RTJ400.  The hardest thing about the jig was understanding their terminology and instructions, which I think were overly complicated.  The jig is very easy to set-up, and gave near perfect results, very quickly.  Bear in mind, I spent a few hours practicing, but the results were worth it.  Using this jig on a router table, makes it very precise, with the only drawback being identical spacing between tails.  I did cut full tails, which are spaced further apart, and, quite frankly, do not look as machine cut (for spacing) that result from many other jigs.
 
Would I buy this particular jig again?  Definitely yes, because in my case, the pain in my hands was limiting enjoying woodworking.

(10-18-2020, 12:06 PM)Ray Newman Wrote: Looks similar to the Keller dovetail jigs, which can also can be used on a router table.

https://www.kellerdovetail.com/