PBCoville9

i haven't posed in a long time but i am getting sick of my spyder and want to get a cocker. i have worked on my friends a little but there is one tihng i am not sure on. i want to get the body custom done from ebay then get all the stuff and put it together. well the person on ebay can drill the holes for the eblade eyes but i dunno if i am going to get a eblade right away (i want to get used to the gun and make sure i liek it b4 i pay for the eblade) would the gun run ok with the holes open? or would it mess up the internals? i haven't had a gun with eyes so i dunno much about them.

ps i tried to do a search on it but couldn't find anything.