I picked up a maple leaf hop unit, autobot 60 bucking, maple leaf steel barrel, a bearing hammer wheel, a barrel stabiliser (this and a file to try and beat the slide sticking issue before it starts) and a guarder spring guide (mostly for ease of adding rubber washers for buffers). Later I was thinking a piston head with an o-ring (still reading into this) and I was debating a cowcow blowback unit at some point but can't find a definitive answer as to whether it'll fit in a standard WE G17 slide.
The overall aim was to get a reliable, accurate, efficient and hopefully durable Glock sidearm, within a reasonable budget, and these were the parts I read were hopefully able to make it.