Those parallel guides look funky and are spendy (says the guy waiting on his third set to come in). I remember looking at them maybe three or four years ago and the reviews weren’t awesome because IIRC they need to hang below the stock with that curved piece which isn’t always convenient but honestly it’s been so long I don’t remember why I passed on them. If I don’t like the benchdogs set I’ll take a look again. 

Lincoln - "Give me six hours to chop down a tree and I will spend the first four sharpening the axe." Dave in AZ