Kinda late but I (as an LNF) and Lechlis (as a high boost turbo lsj) both gapped ours to .06mm (.0236") without any issues. Calc is roughly 3.386 (bore) x.007 = .0237" as Ross mentioned.
Not sure on the lash adjusters, they should come already coated in oil - definitely let them soak and see if they'll break free with a little massaging.
I'd recommend a break-in oil like BR30 or conventional dino oil to bed these rings in for 500 miles. They're hard af and you actually need to drive the vehicle under load to get them to bed (can't just sit there and idle). Do not, under any circumstances, use synthetic oil until it's broken in - you'll wash your cylinders and never get them to bed. No boost but get to highish rpms and let it engine brake - don't be scared by a little smoke it's going to do it until they bed and you change oil.
If it's being a PITA and continues to smoke after it's fully warm and at idle after a solid engine brake, check your oil and if it smells like gas and/or it's more liquidy (you'll know what I mean) then change your oil before 500miles with the same weight/type of oil > give her some boost and pray to the engine gods.