Just a hair past
Well from what was explained to me by Mike Holton who is QA manager at Englander is:
There needs to be enough space around the igniter so the Hot Air can get into the burn pot and lite the wood pellets. Usually that space is 1/8"
So if the head of the igniter is even with the burn pot, then there may not be enough space to properly ignite the wood pellets. Igniter position is crucial and pulling it back a hair may lite the pellets alot quicker! See my HR WP igniter pics below.