I have 90cm inexpensive sling speargun. It is something called XDive, I don't see them anywhere online, honestly it is a low end stuff. I am heading to Thailand in December, and there I will need something to reach out farther than my usual 6 feet, and penetrate bigger fish. I have therefore a dilemma, should I add another band, or plunge into single-band roller conversion? Or should I just buy another gun altogether? Money-wise, adding one more band is the cheapest way to go. Conversion to roller will be double the price of what I paid for the whole gun in first place (70 euros), close to the price of decent two-banded 90cm gun.