Good to see progress is taking place.
Gaz, unsure if you got my PM and sorry if I've jumped the gun with all this, but going by the amount of interest generated already it would look like there is a lot of demand already for your modified pans. (including me)
Is there a good chance you will be making up a few for some lucky LS1 forum members? If so, is there any way to commit to obtaining one either by sending you 2 oil pans or alternatively by transferring to you a holding deposit.
Again, sorry if I've gone and jumped the gun before its all come into fruitation, just I don't want to see you out of pocket by doing all the hard work first and then potentially being left in the lurch. (Unfortunately I have seen this happen on other forums before in the past.)