First thing to do here is to match the gear leg hole to the hole in the gear weldments and match/upsize the hole using a .311 reamer. I had to carefully sand off a little of the powder coating for a smooth fit, I also sprayed a little LPS2 for some lube.
Once that was done, I slipped the weldments into the fuselage put the bolts in and torqued them the best I could with the difficult access. One thing to note here. The bolts that are called out were too short for me (an4-12a) and I've read this on another build site or two so I was sort of expecting it. There were plenty of the next size up bolt (an4-13a) in the hardware bag. Maybe vans knows of the issue and includes them or I'll need to be ordering some bolts later on, oh well.
I put my #12 drill bit through hell drilling the 14 holes through the weldment for the an3 bolts. I also countersunk for the screws through the side fuselage.