Not quite sure I understand your question, if I remember correctly, the lower strap on my Scout is the same (maybe a little lighter in build)as the one on my Ranger. Mine is just a standard web strap with a cam buckle on it. The only thing the velcro on mine is for is to keep the end secure and not flopping around. Is the problem you are having just that the cam buckle is hard to close? If so, that's a good thing as it makes darn sure the tank is secure, wetting it first will make that a little easier however. If it's too loose (very easy to close) you stand a good chance of the tank slipping out of your BC. The Ranger has 2 bands which make the tightness of them less critical but as the top band on the Scout is really more for stability than keeping the tank in place, the lower band needs to be very secure.As for changing it out, as long as the webbing will fit through the slots in the BC, sure you can change it yourself. If the strap is just a little to tight, I would not change anything, esp if it's fairly new as it will strech a little as it gets used. You can adjust the strap in the buckle for a looser fit which will make it easier to close if you really feel you must. If you make an adjustment to the strap, I would suggest you do so after a dive when the band is wet and stretched after a dive.