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Notes on the parts everyone is buying.

Popular kit, read carefully. Mostly this is about the specification that decides whether something fits, which is rarely the one the listing leads with and almost never the one the reviews dwell on.

  1. FPV drones25 mWe.i.r.p. on 5.8 GHz, licence-exemptFPV drones25 mW: the number on the VTX box that Sweden actually enforces

    Video transmitters are sold by the watt. Swedish radio law allows a fortieth of one on the band most of them use, and the antenna counts too.

  2. FPV drones4.0does not link with ExpressLRS 3FPV dronesExpressLRS 4 does not talk to ExpressLRS 3

    The two firmware projects under almost every FPV build changed generations this year. One of them now needs both ends upgraded at once.

  3. E-bikes202718 February: replaceable by a professionalE-bikesThe 2027 battery rule does not say what the brand blogs say

    From February 2027 an e-bike battery must be replaceable. By you, say the marketing posts. By a professional, says the regulation.

  4. E-bikes250 Wrated, pedal-driven, cut at 25 km/hE-bikesThrottle, 750 W, "EU version": is it still a bicycle in Sweden?

    Direct-to-consumer e-bikes arrive with a sticker that says EU. Swedish law has three questions, and the throttle is usually the one that fails.

  5. E-bikes15 May2026: only EN 15194 +A1:2023 countsE-bikesThe e-bike standard quietly changed on 15 May 2026

    There is no "new 2024 standard from January". There is a date in May, and it is mostly about fire.

  6. FPV drones11parts, about 10 770 krFPV dronesThe 5-inch freestyle list I would order tomorrow

    Eleven parts, every pairing checked by the rules, and the two places where the obvious choice is not the right one.

  7. E-bikes750 Wrated, where the EU bicycle limit is 250 WE-bikesThe 750 W kit everyone recommends, and the law nobody mentions

    Every conversion video on YouTube points at the same Bafang mid-drive. Three quarters of them are filmed in a country where it is legal.

  8. 3D printing260 °Cthe hotend ceiling that decides the filament3D printingThe Ender 3 V3 SE prints beautifully, up to 260 degrees

    The reviews are right that it is the best cheap printer in years. They are quieter about the one number that decides what you can put in it.

  9. E-bikes48 V · 20 Ahand the figure the title leaves outE-bikes48 V, 20 Ah, and the number that is not in the title

    Battery listings tell you the two figures that decide range and none of the figure that decides whether it can actually drive your motor.

Guides

The questions people arrive with.

  1. Which goggles work with which video transmitter?Video systems
  2. Why will my radio not bind to this receiver?Control links and bands
  3. Will this board actually bolt into this frame?Mounting patterns
  4. Which battery, and will the plug even fit?Batteries and connectors
  5. What do nano, micro, mini and full actually measure?Camera sizes
  6. What does 2207 mean, and which KV do I want?Motors and propellers
  7. What do the regulations actually attach to?How the rules are structured