the last one of those type valves and inlets I resealed was a 105 which had rock hard seals -not having a replacement set I milled the hard seal out to take a poly 2240 co2 seal on both stem and inlet(I use the same poly seal on the older dan inlets)
instead of the flat exhaust body seal I use an o ring ,did you correctly align the exhaust body with the port
lapping the probe is just like doing a cylinder head valve -bit of paste and twiddle till you see an un broken line of contact on both parts
I have a 140 oring piston head conversion in stock but I only do them on an exchange basis