Problem seems to be resolved. well nearly, after a few emails & messages since my first post i came to the decision that the diff was the main cause of the problem. So gear diff changed to ball diff, the setup basically stayed the same from last meeting except more weight added under lipo & a bit more up front. Luckily when i got to the track only the astro was laid out so managed to run the car around the hall. there was a vast improvement in straight line stability straight away, then did some runs up & down the same bit of astro, fine one way then wandered to the right the other. so now its gone back to handling as last meeting. it now appears the weave in the astro is the main problem to my wandering & not so much the car setup. the ball diff has made a lot of difference over the gear diff, the car is a lot easier & consistent to drive now. The one thing i hadn't considered being the astro was causing me most of the problems.
Thanks to Les (xtreme-rc) post, astro is the devils carpet.
Sean.
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