I'm considering a winter project. I can go online and find a parts list, and it looks like approx $190+/- all in (including a battery, GPS ($16), and AHRS ($15))? I see that the AHRS isn't supported by my Android Avare, so that's going to knock off a few $ if I skip that part. I am assuming it would be a simple job to add it later if I wanted it. My tablet does have internal GPS that works pretty well, but my experience is that an external GPS receiver can get a more reliable signal. So even though it's optional, I think that extra $16 would be a good deal. I didn't look into the s/w, it seems like it's a free download. I've played with Stratux a little bit when flying with someone that has one, so I do have a little familiarity with how it integrates with Avare. Are there any surprises when getting the parts and putting it all together?