I think it’s actually better as a Myers than a Kirk. It’s a little puffier/lacking detail over a Creep, but that isn’t so obvious when it’s stuffed to look like the Nick Shape head.
Mine only started looking the part with a lot of stretching & stuffing:
Less stuffing gives a more Tommy Lee Wallace face:
I just bought my own Kirk. If you don’t mind, could you tell us what paint or any tips in converting this mask. Your conversion is the best I’ve seen, so anything would help.