Note that one of the other reviews mentions that the router lift ties up a router depends on the router. The Bosch 1617 router has both a plunge mount and a fixed mount for a nominal price adder. It takes literally only a few seconds to pull out the router motor and use it externally. And, it's a terrific lift...smooth, accurate...can literally adjust by 0.001, and it's marked in 0.005 increments.
This is a nice router lift. If your wondering if your router will mount in this lift go to either Powermatic or Jet's website and download the instructions. In the back of the instruction booklet it shows over 25 different routers that the plate for lift is drilled for. My Porter-Cable 890 series router fit perfectly, even though it's not one of the routers listed. I emailed Porter-Cable and as I suspected the 890 series routers have the same screw patter as the 690 series, and the PC 690 is listed in the book. It's fairly straight forward to mount your router in this lift. The only drawback is once installed it's pretty much dedicated to this lift and would take about 1/2 hr to swap out. I'm considering getting a Porter-Cable 7518, 5 speed router for this lift to replace the 890 series router I currently have installed in it. The 890 series routers are 2 1/4hp routers and the 7518 (5 spd) is 3 1/4 hp. That would free up my 890 in order to use it as a plunge or fixed based router, since it came in a kit with both bases. What I want to use this lift/router combo for is to make kitchen cabinet doors. The router bits used for making the stiles/rails typically must be a minimum 2 1/4 hp router. It is a nice lift. I purchased the Powermatic because it was less money yet the same lift as the Jet Xacta lift. I also purchased the extension leaf for my Jet table saw (27" x 16") that this lift fits in. It saves shop space which is at a premium for me, since my shop is on my lower level of the house in a 10'x 8' room.