I like long runs too in fact I have 2 PQ 5s 6000mah packs sitting here and after 20 minutes you may want to take a break grab a beer and let your motor cool down. It only takes less than a minute to swap packs (if you have two of them) so if I were you I would just grab two packs and you'll be set. And as far as lehner goes...well Iv'e owned 7 and have replaced 5 of them with neu. The neu motor is way better...better motor..better price...easy to obtain and the germans are not easy to deal with at all. They are next to impossible to get your hands on (like a pink diamond) they are pretty though. Do some searching on this forum theirs tons of info on the lehner motors bro!