Just a brief (and slightly delayed) post.
Schumacher have finally got around to releasing some tyre inserts that fit!
Schumacher buggy inserts
On the left are the new-ish “U6734 Foam Tyre Insert; Med – Rear – CAT (pr)”. On the right the longstanding “U6653 Foam Tyre Insert; Hard – Rear – CAT (pr)”. As you can see there is a pretty big difference in the width, the good news being that the new inserts fill the whole of the tyre, whereas the old ones only supported the centre, and everyone had to use rare-breed foams like the old Snee inserts.
These are a lot easier to get hold of. Schumacher also do a matching “U6733 Foam Tyre Insert; Med – Front – CAT (pr)”, and if you still want the blue compound, get “U6669 Foam Tyre Inserts; Hard – Ultra Wide (pr)”.
My considered opinion on the medium compound insert? It’s just fine. Haven’t done any back-to-back tests so can’t say any more.