i was thinking about buying a parrlax sonar for my BoeBot, but when i realised it costed 50$+shipping here in norway, i thought F$???K that sh1t"so i put that thought aside.but yesterday i was at this shop where they sell all kinds of stuff, and they had this rangefinder thing that is mean to use to messure distances inside houses, and i looked at it and i saw that inside there were 2 sonar disks