you could have installed it yourself.
it's sooo easy that you wouldn't believe it.
there is no real fine tuning per say, except unless you have a weird rear axle for the wheel, then you might have had to do some tweaking, but over all, it's plug and play, as it was for me
re: carrying stuff, i went with Panniers, and Velcro extensions to water bottle cage, etc, as the empty triangle spot was used for the battery.
it's working as designed.
as the name suggest, it is not a motorcycle, the bionX is designed for ASSISTING your pedalling, it does not pedal for you, as other brands of eBikes bold ons do.
for that reason i've chosen BionX vs. the competitors products, as i just wanted assistance for the uphills, but wanted to keep the biking experience as a BIKE, and not a "e-motor-cycle"
i always try to maintain my pedalling as steady-fast as possible to prevent the drag feel you are referring to.
Actually there should be no Drag Feel at all
if you have that, then something is not set up right.
when i do not pedal and coast "free wheeling" it can go on for a good looooong distance on flats and specially on down hill without that DRAG feel.
if you have a DRAG feel, check that your "G" recharge is not activated.
You might want to have some one recheck your bike setup, it just doesn't sounds right.
hmm... re: "raw power" as stated previously the design for the BionX is based on Assisting, not "be a e-motor cycle replacement"
the PL versions of the BionX has the level that lets you push raw power, but it can only do so much on its own, it was meant to throttle you on flats, not on hills.
(i did my research before buying
However it does work well if you have an average weight, in a few occasions i've been just too tired to pedal up a long uphill, and i simply throttle up the rest of the way, the bike net weight is 55 lbs (this includes the 17lbs of the BionX itself), me 165 lbs total some 220 lbs that the bike motor was hauling up on its own, so i'll say it's not bad, quite shabby instead
keep the Assist level at 2 or 3 for hills, and keep Assist level 1 for most of the ride then you can get some 80+ km (50mi) out of a single charge.
i do this on a daily basis for my 45km each way commute.
the Regeneration helps archive the extra 9~10 Km of the short coming of the battery life.