I think that when either one or both reach a point where the shave just starts to get uncomfortable which is when I would normally hone anyway thats the point to stop. If SRP 38 gives up the ghost first and I think it will it won't really prove anything because even though its a 6/8 TI like the SRPs the blade is a tad heavier and that could make the difference in increased shaveability over the lighter SRP. Actually I used SRP 38 this morning and it was pretty rough. I would estimate by this weekend it won't be useable. We'll see.
I think next comes phase 2 where the third TI will get just 30 before strokes (since it appears to be the winner here) and SRP 38 will get 60 before and SRP 39 will get 30 before and 30 after. Of course it could be argued that we have already proved that more honing is better so the third razor isn't necessary but I think the experiment needs to be duplicated as in phase 1 to keep it honest what do you guys think?
At any rate there will be a break before phase 2 starts as I sent SRP 39 out on loan to X Man so until I get it back probably in February with the crumy mail service up North we'll have some time to hash this out and decide just how I want to do it.