Hey Gaz, batteries wise, DMS or RC Model Imports for the Vampire lipos or ebay for the Intellect ones. Both of those are hard cased for racing at Southport/ Formby.
Speedo wise, alot of people are running 1:10 brushless speedos with micro motors. You can get dedicated 1:18/ 1:16 brushless systems and of those the Novak Mongoose, EZrun and Tekin are all pretty popular. Motors tend to be the 6100kv or 6900kv or the 10.5 for the Novak.
If you get the Shark, I believe you can run a 1:10 servo in them so the choice is yours but I think you have to cut the tabs off the servo to fit them in. Micro servos that seem popular are the Hitec, Futaba and Savox. The best place for your gear depends on what you buy but if you do get a shark then parts for them are quite widely available. If you have a quick mooch around UK Micro RC forum, there is tons of good info.
Good to see another micro for the winter mate.
Cheers, Jon.
