There was quite a lot of debate on the Class 22 thread a while back about how one might convert it to EM or P4. I think that the EM gauge fraternity generally decided that the existing wheels could be pulled out slightly on their existing axles, and I hope that this has worked out for them.
This wasn't going to work in P4, and the original wheels could only have been used if they were turned down to P4 profiles. Some folk have suggested fitting P4 tyres to the existing Dapol wheels,
