Yeah, well, from the piccies I assumed these were 15mm.
What scale do PSC consider 10mm to be? If it’s OOO (1/152nd) then the linear dimensions of the parts would be exactly half those of the old Airfix 1/76th stuff. Too fiddly for smoke dischargers, perhaps, but I think perfectly reasonable for anyone other than Mr. Fattythumb Blobmaster for armour packs and dozer blades.
All the best,