Ozzy
The nomenclature of the thread size is at the website... or was... the funny part of it is Albert says you can go to the hardware store to get any or all of the fasteners, screws etc. Then I happend upon the thread sizes of the spikes, either in the manual or online at the wegsite, and it's a European 'metric' thread diameter and count per cm. Wonder what hardware store Albert uses?
but oh, yes, larger spikes do help a lot. Mine are twice if not more the mass of stock ones.
BTW on the Big FAT Dots? A Friend of mine uses them too, though he said the 'change' didn't happen till he had five in there. Like an X I guess.