Hi Peter
I consider myself more of a fiscal Cliff than a precipice!
I would get the cms base unit but fear I would not have the space to store it (or would resent the space it took up in a very crowded single garage with lots of other stuff such as garden furniture, tents etc). It is also quite expensive for a hobbyist. I am guessing the main benefit of the base unit is the no volt switch and the sturdy table? Also I guess, the ability to swap in the TS55R module etc. My thought was that I could always add the base unit later having not wasted too much money or time on the table top to insert the cms module into. I take your point about the need for the sturdy frame and if I go ahead will find something much better than mdf (little more than glorified cardboard I guess).
Re: the idea of a router being a missile, I recall Richard Leon describing a router flying past him so I think you are not exaggerating!
The other idea I toyed with is either buying another router (maybe a Dewalt 625, Trend T11 or Triton TRB001) and building a table top like yours or maybe buying a cheap router table from Axminster or Rutlands. If buying a router table makes sense, do you have any recommendations?
I almost bought a second hand (new condition) cms OF module, cms base unit and dust extraction set for £600 on Ebay but I didn't notice a request to confirm my bid (I was worrying too much about how I would explain it to my wife) and it went to somebody else!
Thanks for all of your suggestions - I think if you had your own Ken Rockwell style (camera reviewer) website you could make a living from your excellent reviews and ingenious techniques!
Regards
Cliff