I picked up a Dremel 8220 several months ago... its great for what its intended uses are. Also picked up the flex shaft...so far. so good with that thing..To call it a router is a bit of a stretch me thinks...But I'm hoping that within certain operations, it will surfice nicely. I also have a colt and the plunge base that goes with it. However, for what I want to do, the Bosch base is a bit clumsy. (line and berry work/inlay). So the search began, looking for a more fitting plunge base for either the colt or the dremel.
Dremel's plunge base............Naaaaaaaaaaaaaa Had one years ago,, it was OK.. but OK is about as far as I'd go... for 35-40 bucks, ya get what ya pay for.
Head and shoulders above all of the contenders is the MicroFence rig. Everything I've seen, everything I've read including reviews say this setup is just outstanding. The Microfence is the one I want, but the price tag kinda throws a wrench into this choice: 500 +/- for the plunge base and circle attachment alone for the dremel....close to a grand for a complete package...lil more for the colt package. Your likely to hit the lottery before you can figure out the pricing at the website?? https://microfence.com/
The Lee Valley package seems to be the best deal for the money. Designed specifically for small rotary tools. At 170 you pretty much get everything you might expect. Being a relatively new item reviews are limited as are the number of video's available. An open ended plunge base is ideal for my needs and i'm sure it could be adapted as necessary. Design, construction and materials used all seem to be within the Veritas standard which speaks volumes to me. A small light would be nice, but I'm sure one can be easily adapted as well as some kind of puffer to blow away the sawdust. The circle jig and fence look to be solid enough. All in all, I'm really liking this package. Veritas® Plunge Base for Rotary Tools - Lee Valley Tools
The StewMac plunge router base and accessories are a pretty close second. A big plus is a proven track record. Several members have StewMac bases and really like them! The plunge base is relatively new to the StewMac lineup, but like Lee Valley...I'd be surprised if it were anything less than excellent. For me the negative is that the circle jig only goes down to 2"s and the fence appears to be somewhat limited. The plunge comes with its own light which is VERY nice!! StewMac also has a mini air pump that is little more than an aquarium pump...should adapt easily to just about any other mfg. uint. Pricing pushes the 275 mark +/-. Designed specifically for the luthier market this unit looks quite versatile!!! StewMac Plunge Router Base | stewmac.com
Luthiers Mercantile (LMI.com) offers what appears to be a very well made option. For me the pricing kinda takes it out of the race. AT 260 for the plunge base which by the way has a rather unique plunge mechanism makes it kind of the odd man out. The circle jig is a bit odd as well. Not to say either won't work, just different by most standards. The circle jig checks in at 125. I didn't see anything for a fence. There is a blower base available for the unit. LMI Rotary Plunge Tool Assembly
Right now, I"m thinking, keep the colt a colt. Use it as the "small" router its designed to be and find something to fit the Dremel and use it for what its designed to do. I've done some freehand work with micro carbide bits with great success using the dremel. So I'm thinking the Lee Valley outfit ought to fit the bill nicely.