I was planning on running premounts so using OFNA or GRP foams with Proline tires is not as attractive of an option as just going with GRP or another brand of premounts. I have had this issue with proline buggy tires as well, I have had the foams separate into pieces during a race on a couple occasions.
Any one running GRP zero offset on a CRT?
I'll give Proline a chance to replace the three brand new sets of wheels, foams and tires I have now but if they decide not to work with me on this issue then I will not buy any Proline products from then on.