Hi there.

Answers are as the following :

1) Yes, upgrading the board does help to save your battery, smoother operation and a new software is in.

2) Having a longer barrel doesn't mean it's more accurate. Most of the ballers only use 14" because it is shorter,
    easier to move. What determine your accuracy is how you hold your marker, barrel bore size matched with
    the pallet size, the weight of your bolt and operating pressure that lays on your pallet during fire.

3) It should be enough if your marker is capped at 15 bps since the halo is capable to feed at 20bps. But, i suggest
    you take the Velocity Selectforce which enables more function such as tension setting and more.

Come drop by this saturday and sunday (1st & 2nd Nov) at MAPAAC Astaka. We are having our MY-NPL Grand Final there