The specs on that sound just like the specs on the pre built ones I got a while back. I got mine for $80 a piece though. Now, IF it’s the same (which I reckon it probs is as I’ve seen that pre fabbed set up a number of times on zeBay) there’s a few things you’ll need to know.
Firstly and mainly, the ‘shimming’ is very poor. There were shims in both of mine, one was shit, the other was worse. So you’ll need to correct that straight away.
Secondly, the pinion gear was not even grub screwed on to the motor on either box let alone loc tited (loc tited? Is that even a word?) so whatever you do, DO NOT drop in and use. You must check that as well.
5A switch is standard across basically all stock Gen8 boxes. Fuck it off and get a 10.1A.
Wiring loom is not bad. Silicon wiring has better flex though.
Motor is, again, not bad I guess but it’s probably not a great deal better than a stock one.
Gears are just pot metal Chinesium so how well they’ll hold together is luck of the draw there. Good shimming will defs help.
Cylinder head and nozzle are just the shitty stock Gen8 gubbins. Get better ones.
Cylinder and piston are just generic ‘upgraded’ pieces. They do the job but there are better offerings. O Ring is garbage.
IF it’s the Singularity gearbox case then that’s good. They’re well built bits of kit in my opinion. They take 8mm bearings/bushes.
All in all, those ‘pre built’ boxes are not a bad buy but not for $160. For $80, maybe, but I didn’t know shit back when I bought them so they’re probs not actually really worth that. Considering the amount of stuff I had to do to get going efficiently and reliably I think you’d be better off just piecing together your own stuff and going from there. I know you stated that you were on the novice end of the spectrum regarding building so that is something you likely didn’t really want to hear. However, Gen8s are great to get familiar with how our little blasters work as they’re still essentially the same as their newer counterparts but don’t have the complexity when it comes to the electronics and trigger mech side.
Good luck my man, I hope you go well with whatever route you decide to take.