Just for reference, the GEV conversions have three components:
1) The back jets. These are made from two small sections of plastirod, lightly filed down into cone shapes at the front.
2) The back cabin, which is a chunk of plastic sprue measuring 3x3x2mm, IIRC, with an angular cut at one end, designed to mate it easily to the front cabin.
3) A wire nubbin attached to the front for the main gun.
Of all the conversions, #3 is definitely the most difficult! Drilling a socket in O8’s alloy is a major stone-cold bummer.
We get slapped around, but we have a good time!