1. I only got mine yesterday - I've read about quite a few people "fixing" theirs, and some of them breaking their screen in the process, so I guess it depends how confident you are... I haven't looked at mine yet - and my mod came from their second manufacturing run, so I'm not sure if the issue is still there or whether it was resolved. My supplier explained that the delay on my reuleaux being shipped was due to an issue in manufacturing with the screen. I'd be interested to know if this was resolved after the initial problem 2. mod resistance I left alone (0.003 default from the manufacturer) - this seems to be ok based on what I've read, but I'd be interested in any results anyone posts. I think the level of resistance we're dealing with is so low that even with some % variation between mods it won't make much difference. Battery watt-hours I hit the calculator button, click yes for knowing the voltage insert the mAh value (mine was 2500) and leave voltage at 11.1. The calculator will tell you the watt hours value and offer to use this. I haven't done the discharge test yet... Ambient temperature - I haven't touched this yet 3. I imagine there will be some variance, but whether this will be enough to notice - I'm not so sure... 4. I only just got this new toy so not gonna speculate on what the next one will be ...