Was just thinking that if someone wanted to make the straps more secure on the slingshot boots it would be easy to glue, stitch, or rivet them together and then when the velcro wears-out just snip the straps off, put new ones on and start again.
... cant do this with CWB, you'd just end up with a setup like the vantage's straps
BUT if someone really loved the fit of the vantages specifically and wanted replacement straps it would not be terribly difficult to take the existing straps and sew a D-ring into it to create a set-up similar to slingshot and then either make your own straps or buy Slingshot replacements and make a LF/SS hybrid velcro boot HAHA