Mek KFF conversion

For my kan wall list I need another Big Mek with KFF, so rather than buy a second copy of the same model I decided to convert one with stuff in my bits box. I found a good thread on dakka dakka that gave me some good ideas and here's what I came up with.

Bits include: nob from AOBR, mek bits from lootas box, battle wagon pieces, bastion do-dads and some imperial guard vehicle what-cha-ma-call-its.