Help with wandering DB01R

[carnage]

Hi
I thought I'd ask the experts
I've been running my db01r for 8 or so months and have had centering issues for 5 of those months
Problem in point form as it's easier for some one educated in Maggie Thatchers England
. Steering continuially needs to be "trimmed" during a run seems to bea variation of 2-3 clicks
New servo (Savox)
new radio old Hitec pro car, new radio Core rc
tried toe in
tried shimming out slop, tried leaving in slop
steering loose and free of binding
really losing confidence when runniong the car, aparft from that, I love it,
jus need to be able to go in a straight line lap after lap
look forward to your thoughts
Steve