Here is the collet I use (I don’t have to remove it from the machine): http://www.precisebits.com/products/equipment/bosch_1618_kits.asp?tsPT=!!!Bosch_1618!!!KIT!!!PG!!!
Here is a link to the rigidity mods i did. This literally took one trip to the hardware store and about 3 hours of time (plus wire routing, belt-tightening, squaring, etc.). Some people are WAY over complicating some of these simple mods:
The Hitachi mount (I only used the two brackets, not the big black backboard): Router Mount
I used the standard spindle mount plate as a template and made it 1" taller and used three sets of v-wheels.
It is solid as a rock (at least compared to my last three machines).