Just don`t forget (with all 3-speed syncro boxes) "mainly"--> 2x things
On the first/2nd hub-assy, there is a small "pawl" inside the hub,,, don`t forget to put it back in
& 2ndly,,, the outer-ring needs to "line-up" with the ramp to that Pawl
you will have to look closely when re-assembling the hub assy when you fit your new detent springs
there is a tint little "ramP' on one spline,,, that ramp needs to line-up (IE: the outer-ring needs to be oriented correctly) so the Pawl lines-up with that little ramp
otherwise 2nd gear selection will not-only be very difficult to engage but if/when it does it will crunch every time.
it`s a catch for young players
the rest is per std issue mini gearbox over-haul,,, IE: make sure everything is absolutely spot-on,,, it`s a VERY MAJOR opperation fitting it all together,,, fitting & conecting the power-unit into the car,,, only to find you have stuffed-up some silly little thing inside the box & have to rip it all apart again to correct that
cheers & have fun, & if you need a hand with advice along the way please don`t hessitate to cal me, happy to help if/where i can,
Matt 0407 135 656