I'll be buying one in September,8C version.Any tips/experiences to use it to train for running?My knees won't take constant running anymore so I plan to use the ElliptiGo for my training and treat myself to a mile or 5k parkrun or local 'allcomers' track meet every month or two.Top speed is 25mph so I assume it's roughly twice as easy as running so a hard hour a day would equal 70-80 miles run per week which is plenty for an old man.Thoughts/comments welcome.