theses look good from the same guy http://www.ebay.co.uk/itm/Hunting-Catapult-Slingshot-SPS-style-Loop-1745-power-bands-Super-strong-frame-/181464677369?pt=UK_SportingGoods_Hunting_ShootingSports_ET&hash=item2a40233bf9
http://www.ebay.co.uk/itm/SPS-Style-Hunting-Catapult-Stainless-STEEL-CORE-Add-own-scales-finish-3mm-/171257026569?pt=UK_SportingGoods_Hunting_ShootingSports_ET&hash=item27dfb6d809 or make your own
no mate, that's tubes. I use looped 1745s. Last forever!! Latex is a sheet elastic like theraband, comes in different thickness, .30 .40 etc. last a lot longer than theraband!
i think you"l find 1745 is latex. you havin a blonde moment
yeah they will be faster and more accurate at longer ranges . marbles are good for close range head shots as they produce more ft lbs (then loose power quickly as they are so light for there size) but any further they tend to swerve like you said
and yes .177 is better than .22