Kelly Staking is interesting but without tools it does take a bit of extra calculation. I am very similar to you in that I have a comfort zone and am loathe to bet anything under about 1.70 but I do sometimes take long odds and I use the principle of Kelly Staking when I do. Long odds do give you greater variance but if your stake is lower then it does smooth out your results. I sometimes use The Geeks Toy to trade in-play on Betfair and there is a staking mode there based on Payout where basically your stake is auto-calculated by dividing your set payout amount by your odds. For instance if your Payout value is set at $100, then at 2.00 odds you are betting $50 and at 5.00 odds you are betting $20 and at 10.00 odds you are betting $10. It works pretty well for me and I've found great value at long odds and not been punished for over-staking them.