Hi Matey,
if its damp/wet/cold then i would say the main issue is your rear tyres... I haven't tried the dBoots Multibytes yet, they snook onto the market lae lastyear so something we haven't had a go with... i liked the A compound A compound Nanobytes for indoors so worth a go.. let us know how they work out for you.
Silver Schuey Minispikes on back with blues up front are definitely recommended in those conditions... i run Schumacher hard foam inserts in the Silvers too, with fastrax yellow compound moulded inserts in all other compounds.
Weights will definitely help you get traction, 50g TLR rear weight will be well worth adding in wet/damp.
Shock wise i like the emulsion type bleeder caps but they do take some getting used to from regular 22 type shocks.
Here is the TLR tips video which might help you:
http://losiracing.blogspot.co.uk/201...1_archive.html
Piston mod... these are the tips i got from Andy 'Gnarly Old Dog':
Get an old shock shaft and put it in a dremel (threaded end into the dremel).
Take a piston and press fit it onto the shock shaft - normally the fit is tight enough that you don't need to secure the piston.
Spin up the dremel at about speed 4-6 (my Li-Ion dremel goes upto speed 10)and very lightly, take a piece of 600 grit wet-n-dry to the uper edge of the piston where the side meets the upper face.
What you're trying to achieve is a small radius between the upper face of the piston and the piston side edge. If you look at the old Losi pistons in the old shocks, you'll notice that they have this radius whereas the new pistons in the big bores don't.
Once you've done the top face, stop the dremel and flip the piston and repeat for the other face.
With practice, it takes about 10 mins to do a set of 4 pistons neatly. You don't want to spin up the dremel too fast because you don't want to melt the piston and a 600grit is smooth enough to make a nice surface finish. You can go coarser but the surface finish suffers.
100% recommend this mod, really helps the truck react quicker and gives a real advantage on bumpy tracks with smoothing out the drive, meaning you can more power down against opposition.
Hopefully the UK SCT Nationals 2013 will see a round hosted by SHRCC again so we should all be coming down 'Saarrf' for a blast, so will be good to get some local knowledge tips off you if this happens
Keep us in the loop matey and give us a shout if you want any help.
Mark.