To get a decent runner out of the HE Leo2 A5 you will need to upgrade the electronics as the original kit is single speed ( very fast ) forwards & backwards.
I ripped out the HE electronics and fitted a HL RX14 S&S board to give me 'proportional' control.
Also, the idler wheels need some work and the suspension needs beefing up. ( all very simple to do )
I'm happy to help if/when you take delivery.

Cheers
John