Have just ordered the PCB boards. Order 10 pcs, so if anyone wants one, we can sort out a price that covers the cost + shipping.
Also, order strain gauge and holders for cr2032 battery. Decided to not move anything on the PCB if I ever wanted the cr2032 on top of the board.
The plan now is to make a small 3D printed housing for the board which will be potted and clued onto the crank arm. The cr2032 will stay in a not potted box beside, for removal. Have not decided how I will get that 100 % waterproof.
Making a test box for the electronics, to find out how it will look. First, it is very bulky, too bulky for the right crankarm. Therefore the coin-cell battery has to be removed from the top of the PCB, to the side. Since the battery holder does not come pre-soldered on the PCB, the current PCB file are ok (just solder some wire on) but I will probably change that since I haven't ordered it yet. If someone knows about a small battery that fits this project better, please contact me.