Opening your first few gearboxes is a piece of pi$$
IT IS CLOSING THE BASTID'S UP THAT IS THE PROBLEM !!!!
Kudos to Samurai - one or two 10-15mm round "earth" or "neodym" magnets under box where AR latch goes
that REALLY helps to keep the AR latch in place so you only need 3 hands - not 4 now
don't work on trigger as that ain't magnetic but at least you got one less thing to jump out
Now all that is left is spring, yup sounds easy, couple of "dry runs" without spring seeing how it best closes up
usually cylinder head side lowering into position first etc.....
Then the spring with a nice fitting screwdriver or something helping to pivot & hold spring guide downwards
If cylinder has port then this aligned with piston runners to ensure piston stays put and not jump off the guides
Oh there is loads of stuff you suss out and pick up tips & techniques of your own along the way too
M100 or M105 springs are a breeze, m115/120 you can feel the extra resistance when inserting springs
Best one was the DSG with a m150 or M160 mofo in it - f*ck me that was "fun" on ya own
no really - about 3 times I "thought" I had finally done it up only to find something had just popped out at last final closing of box
we are talking about 15 attempts - maybe more and was really close to giving up a couple of times
hands now covered in grease - even though they was dry & clean, slipping eveywhere, trying to get some grip/leverage to compress spring
but the trigger/spring wants to jump right out the moment you even fart or breathe near it
f*ckety f*ckety f*ck f*ck f*ck
Yeah - the whole dsg stuff is way way over rated imho - slight shortstroke m120 with a 13 or 14:1 gear set is much easier to build
and that is the easy bit - it is all the checking and sanding/file and checking that it all fits and works properly that takes the time
(imho depending on work involved and how meticulous you are a box should take most of weekend to strip, rebuild totally and assemble/test)
yup you can do it very quick if just replacing one or two parts - but a full box and getting everything as good as you can get it
will take more than a day - often you will need to step back - look for something or a break to de-stress or rethink any issues etc....
Some crap just don't wanna go in & work quite how you expect it - some boxes/gears just sound $hit no matter how well you shim & reshim
Well that is my take on them - but finding me taking more care/time is producing much better results than my first few builds
Oh and v3 - at least you test the damn box very quickly, seeing the bevel gear's position shifting as you adjust motor height
getting it as quiet and schreech free as possible - heck you can even loosen the motor frame/cage and slightly pull it a smidge
to get angle as close to perfection as possible
V2's not quite as "test" friendly before you find out how crap that build sounds