Thanks! Yeah, might have to go with squares then. The new GRPs are actually under 60 EUR shipped from IT for 2 pair, that's not bad at all.
Being a total noob at this, what compound would you suggest, given the truck is about 5.4 kg like yours, the softest (S1 SuperSoft)? I like them to be grippy, but if that means wearing them out after a couple of runs, I'd settle for a bit less grip and a harder tire.
What compound are your PMTs and how did those wear on your truck? I've seen some softer ones being sold used on eBay and they typically look shredded.
EDIT.
Surface is likely to be that HSV Stadium Parkplatz in my video here, not even asphalt, but it'll do for now :D:
https://www.youtube.com/watch?v=oxQXPdnsYAY