pretty much my thoughts
you double the unsupported shaft length you must more than double the wear on the bearing due to leverage
you are also like you say wolf amplifying any slightly out of true running

another concern i have is the base of the woolf craft router table i use is pressed steel and any extra leverage will cause it to move  out of true[tipping the cutter by a tiny amount]

so i am planning on covering the top with 12mm mdf which with help with larger cutters[bigger than the hole in the metal top] that have to go sub surface to line up
screw the metal and mdf together in several places
then secure the router with 3 or 4  no 6 or 8 countersunk machine bolts and spring washers
throught the mdf steel and purpose  made holes in the router base


any critisism suggestions or comments welcome

OK, thanks for that Big_all, it may be something to look at/into....TA!!!

yep thanks J F C
i am looking forward "playing " with the collet and getting it ballanced and useing it

trouble is i have a part made bed unit and a fitted wardrobe double door frame assembly "cluttering" up the workshop