I bought the Citadel Finecast of the big mek with kustom force field, and was pretty disappointed with the sculpt. I expected a higher quality figure with the label “Finecast”. Fortunately, the KFF portion of the sculpt was in decent shape. The mekboy figure didn’t have the equipment loadout of the one in my army list, so I found an unused metal nob and took a suitable kombi weapon from the plastic nob kit to use as a “mekanized” burna. This is still a work in progress.
Big Mek Grotbug - Burna, KFF, Cybork, 'Eavy Armor