250 grams for all three retract units, oleo struts, wheels, axles, and wheel collars. Add in supporting structure and wiring and you'll likely be close to 300 grams for the entire retract system.
I chose a target weight of 1900g and (as usual) I'm finding it was overly optimistic. The fuselage itself is already 1 kilo, and the battery is 400g. A realistic weight (with all of the wood and electronics) is 500g per wing - I'm now hoping to come in under 2.5kg.
Speaking of wings, here's some progress on the left one:
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Doesn't sound like Mighty Mini territory.......