I have a Sierra that I may not keep around for my 13yo. It currently has a Smart-DPV controller, a Blacktip prop, and no battery. I have most of a PTB adapter made and I haven’t had the need to finish it. I honestly will probably keep it. That said, I really liked my Sierra. It had 90+minnof runtime with a Lipo battery, and is a solid scooter for many things. I have had it in Mine/cave dives with no flow, and I’ve ridden around my local dive lake countless times. BUT, and this is a big but, I now have a Cuda 400 with a Lithium Battery and it is night and day from the Sierra. It is fast and has a 3-4hr run time, and about double the thrust. If you are trying to get into Ginnie, for example, I’m not sure how well a Sierra would do in that situation. The Sierra is fun, but think about what you want to do with it. I haven’t used a Pirahna for any extended period of time. If you can find the Smart Slice you can run PTB batteries and theoretically travel with the P1 or P2. The original NiMh Cuda 400 battery could also be traveled with, but I don’t think it is straightforward. A buddy got grief in Cancun with the NiMh Cuda Battery.
