hi kirk, overall it looks pretty decent for a scratchbuild.
there are only a few things you would need to change for EIB.
here is the requirements for EIB that show what would need to be fixed on your blaster.
No ESB/ROTJ greeblies are allowed on the blaster.
Scratch-built, resin cast, Hyperfirm rubber cast blasters shall have a total of 6 T-tracks on blaster (leaving the lowest row on the magazine housing side uncovered).
the U shaped tracks and the d-ring in the front are both ROTJ details and should not be present on an ANH blaster. i would suggest removing the u-tracks and replacing them with T-tracks. you can make T shaped tracks very easily with the tines from a garden rake like this one LINK this is simple and cheap way to make the proper "T" profile tracks for the barrel
also it is not stated in the requirements but it looks like the end detail on the folding stock is attached up-side-down
other than that i would suggest you could put a coat of flat black paint over the unpainted plastic parts to get a consistent color. but that is not required for EI and completely optional
hope to see apply soon