Rich... it seems i had the opposite to you!! lol!!
Nothing on the sweeper everywhere else though the car was good.
Okay i dont run a Tamiya, i run Fabs Mid RB5 MCS.
Firstly i run 30deg front kick up.. this i find suits me, gives a little less initial but more mid and exit.. 25deg gives much more initial but is not to my likeing mid exit..I also run the hubs in the middle position and about 2mm on the ackermann which smooths everythng out for me..
I tried quite a few things on the car.. went from long to short wheelbase.. the car felt more planted and seemed to change direction quicker BUT didnt cure the sweeper for me.. i messed with front links.. ended up outer tower and outer hub.. the steering seemed to react quicker but again didnt give me what i wanted on the sweeper after the intial turn in it just washed out...
For the players ive gone to a longer front link in the hope to induce more front end by rolling more.. ok i may loose a little initial but should hopefully gain mid and exit... so im inner tower and now inside hub..
I will see how this feels..im guessing it will be better, but i also think if i lift of the rear might snap away, but could well be controllable on the throttle..if so add washers under inner stud.. still not happy i will play with the rear links..
Ultimatley i like the feel of the car in long wheelbase.. i have run it everywhere in this guise out doors in all grip conditions, worksop is really the only place ive struggled.. saying that its the first time ive even run the car on this type of surface!! HOpefully i'll sort this coming weekend!
Cheers
Nick