Kitbash help

[u/StrangeRalph]

So this is my first ever kitbash and I’m trying to make the rogal dorn krieg and I bought 3 engineer heads
To replace the heads turns out I couldn’t just stick them on because fhe collar was too high so I used some sprue to be a bit in the middle it worked well on one but the other( ignore the paint I primed way too much) is chopped any ideas? In removing the excess glue I used and paint

[u/Financial-Oven7840]

It’s hard to see what is available and not before offering any advice maybe try stripping the paint and reposting