Kits from re-303 include circuit boards but lack a case; Kumptronics offers fully assembled units ready to play.

The RE-909 uses two AA batteries to retain volatile memory, though a LiPo and charging circuit upgrade is possible for extended power retention.

Building an RE-909 through Kumptronics involves choosing a color scheme and joining a waiting list, with completion taking about a month after your spot is up.

Potential buyers should note the possibility of communication delays with Kumptronics, as some have reported no replies to inquiries.

Building the RE-909 took approximately 50 hours, with significant time spent ensuring components were neatly aligned.

The kit includes PCBs, pots, switches, and ROMs, but sourcing rare parts might require using suppliers like utsource, Mouser, Digikey, and Farnell.

For DIY builders, it’s unclear if the bundle includes all needed components beyond the case, suggesting a need for careful checklists.

Beginners should practice soldering on simpler projects like an LED chaser or Atari Punk Console before tackling the complex RE-909 kit.

The RE-909 project requires careful organization and component sourcing, as not all parts are included in the kit.

Excessive heat during soldering can lift circuit board pads, especially affecting transistors, diodes, and certain capacitors.

The RE-909's case from Kumptronics is a tight fit, especially the cables from the switchboard to the main board, requiring careful installation.

The RE-909 is not considered a low part count kit, contrary to some impressions from promotional images.

Building the RE-909 kit can save approximately $1500 compared to buying an assembled unit, but involves significant effort and skill.

For the RE-909, the Nichicon QYX series film capacitors from Digikey are recommended for those building the kit.

The partial kit's EPROMs require adapter boards due to pinout differences, but original EPROMs can be flashed and used directly if preferred.