So i am looking at building this speargun and i was wondering if anyone could help me out with some design changes that could be made or even with tips that i could use whilst making the gun. it is going to be overall 1200mm long with the barrel length of 1000mm. it will be 45mm wide by 50mm deep. hopefully i am going to power it with two 16mm rubbers but am yet to find out all the details. So if you can help a newbie like me in anyway i would greatly appreciate it.