LOL
this is version 15!.. well, no version 3 but just experimenting with what I can get away with as regards the adapter wall’s thickness.
The Mini already had the 3M fixings adhered to the underneath for the pre-existing white strobe fitting (not velcro) There is little potential inertia in these Strobons and the relative effort to knock them of is considerably more than I imagine on a lateral crash… in which case I don’t mind them falling of than catching on something.
in reference to @Acedrone comment on landing… I prefer to hand land and launch… but i did lay the device down and it rests on the rear ‘stumps’ when the adapter is situated in the middle of the vents (as it is in the photo) You could move the adapter fore or aft depending on where the centre of gravity is and where you decide where to put it.
as regards landing… yet to be practiced… the adapter is VERY strong on a upward stress… (a typically strong shape being triangular) I actually tried to crush it under my thumb with my full upper body weight on it. it will not crush.
Despite @PingSpike trying to rubbish my work and make me do another version… 
LOL I might put the design on Thingiverse as another option for flyers. I could put a void in the flats under the Strobons but the weight saving is negligible. It is very light in itself… the bulk of the added weight is from the lights.
)