While analysing the hit and glitch probabilities a thought popped into my head based on one of the ideas from 'Tweaking the Rules' on page 59.
In the standard rules if you have a dice pool of 2 it's impossible to get 3 hits unless you spend edge. Also you don't get to try at all if your dice pool is reduced to 0. Well the following rule gets around that:
For all tests replace one of the dice in the dice pool with a Chaos Dice, a different coloured or otherwise distinguishable dice. The Rule of Six applies to the Chaos Dice even when no Edge is used, otherwise it acts as any other dice in the pool.
Also if the dice pool is reduced to 0 or less and Edge is not spent to make a Long Shot then roll the Chaos Dice. Critical Glitches occur on rolls of 1 or 2 and hits only occur on a roll of 6. As this is the Chaos Dice the Rule of Six applies and as such it is possible to achieve multiple hits even when the odds are against it.
I haven't had a chance to play tested it properly yet but thought I might get some useful feedback from others who have tried similar things.