With a running rig there is absolutely no advantage of using tubing nor flying back leads. The less bits and pieces hanging from your line allows the bites to be transmitted to your alarm more efficiently. Mono main line straight through with a fluoro hook link is very unlikely to tangle and, contrary to some suggestions, it is not necessary to strike in order to set the hook. I have now used this set up, with light leads at all ranges, for in excess of 10 years and the bites are normally screamers and well hooked and I am now convinced that the weight of the lead has very little to do with hooking the fish.