Can you use a chainguide as a tensioner, specifically an MRP World Cup II? My idea was that I'd get the chain fairly tight, then install the wheels on the chainring and push up on them to tighten up the slack. That way I can still use quick release skewers on a horizontal dropout without the Eccentric bottom bracket. Or, it may be a pile of poo and not work. Also wondering if it's possible to use a taller chainring, because the mrp guide only works well with the 42t ring, I'm not sure if I can run a bigger gear in the rear to make up for it.