I bought the i-shoot grip for X-E1 and later the Lensmate thumb grip. Both (individually) help the handling in different ways but, when used together, the top contoured flange of the handgrip obstructs comfortable access to the shutter release. This is because of the altered hand position when using the thumb grip. However, even though it adds weight and bulk, I'm a bit in love with the I-shoot grip and would like to carve a bit off the top of the handgrip component. I read on the forum that this part is plastic although to me it appears to be cast metal, and cold to the touch like the rest of the bracket. As far as I can tell, the upper part of the handgrip is solid material. Before I start filing (and smoothing off) the top of the handgrip component (and possibly ruining it) I'd like to know for sure: (i) is it metal (in which case the black finish would be spoilt) or is it self-colored plastic? And (ii) Is it definitely uniform solid material (as it appears to be to me) so that I can file it down without exposing an air space or inconsistent mateial structure? Thanks for any advice!