Sometimes there's things you want to change that the Tx can't do. For example say you're switching from LiPos to NiMHs and need to turn off the LiPo cutoff. This may be more useful for say the Mamba Max than the Mamba Monster, but it would still be a nice feature to have. I run both LiPos and NiMHs on my MM powered Losi XXX-S and it's a pain to have plug in to my laptop to turn off the LiPo cut off to switch to NiMHbatteries, or I have to risk running LiPos without a cut off.

A programming card similar to the ones that Losi Xcelorin systems come with would be perfect in my opinion. Simple jumper based system.