Quick question (sort of in line with this discussion), how hard is it to upgrade to ps3 an engine that was conventional or something like ps1 (sound only)? My impression is that as a DIY project it is a lot more difficult than doing let's say ERR (not saying ERR is better than PS3 or cheaper, meant level of difficulty). Plus I assume PS3 is for DC motor units only ie wouldn't work on an AC engine?
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