I just received a response from Capt.O and he would like verification on the bolt probe O-ring sizes for .177 and the .22 Maximus. He thinks they are 004 and 006 respectively. With that info, the kit will be complete and I will be receiving a 'prototype' for testing/ verification The EVP lists the probe part number as "970-028" (.22 cal)BTW, I did not find any O-ring part numbers on any of the EVP's except for the bolt probe, oh and gauge seal.Thank You again for all those who have contributed to this cause, and hopefully someone else finds this information useful if they are trying to completely re-seal a Maximus.M