No - It's not allowed to grill during riding your bike. Obviously it is pretty dangerous to ride around with 800°C hot BBQ in front of your bike. So, please get rid of the hot charcoal or wait until it's nearly completely cold.
Yes - we developed the attachment, that it fits all common bikes. Maybe you need to reposition your bike bell or lights but thats it.
Depending on the E-Bike you have, the standard attachment might doesn't fit. But when you support us and recognize after the shipment that the attachment really doesn't work, we will send you a customized one just for your bike.
Theoretically yes - All you need is a one horizontal bar (max diameter 40mm) and something vertical (i.e. a bar or a surface). Of course, the metal attachment conducts the heat as well. Depending on the amount and type of coal, the attachment can get really hot too. We tried it on a balcony (steel bar) and everything worked well. But if the attachment (or the grill) touches something out of plastic or rubber, that part might deform. We don't guarantee the safe usage of the BBQ on every kind of bar where it could hang.
Yes you can extend it. Just lift the grill racks, extend it, and put the grill racks on the top again. Obviously, in the extended version,the BBQ is not completely balanced because the attachment is in the middle of the "bigger drawer".
Don't see the answer to your question? Ask the project creator directly.