On a weed and snag free lake a 10ft shock leader is not long enough, you need around 12 feet to prevent snap-offs.
Again on a clear water where you need a fluorocarbon leader for 'invisibility', 10ft is around right I reckon.
Sorry mate, I really think you need to think your arguments through properly.
As an aside, and in response to Mooseman, I refuse to use Lead clips for various reasons. I don't often want to eject the lead, I use generic swivels, as in I don't buy one end tackle manufacturers bits, I have a variety that suits, and I don't think that I should be forced to buy overpriced swivels from Korda, Nash or Fox just to suit a lead clip, or I use a tail rubber for more than one purpose, and so have loads of tail rubbers, but why would I buy Nash tail rubbers when I already have plenty just to suit his lead clip.
As he says, a lead clip tail rubber can be jammed on by a bit of weed, the leadcore on a pendant or inline set-up is a danger in itself, even if the lead comes off, the leadcore is an inherent trailing weight.
Basically leadcore should only ever be used with a heli set-up, and even then, you have to be sure that the beads and rig can be ejected, as a kink can trap a standard bead, stopping the rib coming off the end.
On that helicopter set-up, you actually rely on the lead NOT being ejected, so that rig CAN be ejected!