haven't updated this in quite a while, so here goes.
i moved the linkage closer to the pedal pivot as suggested and it works
a lot better with that setup.
i added a miniature switch for the hi-beam (finally)
then the kicker gear exploded and the whole thing spiralled
into a never-ending series of tranny surgery desasters
(i rebuilt the darn thing several times now) over the whole 2018...
i proved that it is possible to rebuilt a 3 speed in frame!
(don't ask me why i had to prove that

)
completely senseless, haha... but it's possible.
still managed to have some fun, though!
but then it bit me again
i noticed there were different style kicker gears over the years...
i ended up using the original part that i had swapped out years ago and for now it is in stable condition
the HMB clutch and belt conversion is absolutely awesome,
it works super smooth and since everything is well covered it still
looks like new in there. completely different bike with the swap.
it bites the eye, though, together with the rest of the bike,
so the cover has another good reason to be on there!
also i bought a brand new gear box (4speed in a 3speed housing)
and put it on the shelf as a permanent threat to the old tranny.