Hi, thanks for your replies, I finally took the bull by the horns and did it myself. It's not that hard in the end, and I am glad I am not the onyl one having had to fix multiple punctures on the back wheel (I noticed a lot of broken botttles on the cycle lanes, I wonder if this is a trend perpetuated by cyclist haters...). I might have to take it to the shop anyways, as the derailleur needs tweaking, and the motor started straggering after I got splashed by a car (I might, again, give it a go myself, but I live on the 3rd floor of a triplex and having to remove pretty much all the components to have this done is a drag...). I am a little disappointed how much more work an ebike needs compared to a traditional one. My previous bike last me 25 years, and I had it serviced 5 times... Just for the punctures, that's the 20th I had in a whole year...maintenant is almost becoming a full time job I am actually thinking of getting a traditional one to use when the weather isn't nice enough to use my ebike.