You do know they unscrew as its a rear with a handbrake?
I’ve got a rewind tool if you want a borrow @MartG1960
Yes - even using the rewinding tool to unscrew it I needed a breaker bar to shift it.
I’ve just accepted the fact that getting it out is going to cause further damage to the piston, so ordered a new pair ( I suspect the other rear caliper is in similar condition )
The good news … the red paint is in good condition. 
Was just checking but you do know what your doing and you have the right tools 
From experience rear hand-brake calipers don’t repair very easily 
and end up a nightmare
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I know - these aren’t the first ones I’ve done 
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Does this mean you’ve been lost to the Heli Hover brigade Steve? 
No… No… No… quads and wings still rule the skies 
(just another toy to tear my hair out with)
Haha well it’s a cool new toy 
so will you be doing the 3D flying
LOL not for a while, a long long while… @notveryprettyboy would not forgive me if I mastered that before ACRO quad flying
Building a Cinewhoop … Shendrones Squirt 2.1 frame (on the way) , parts i have already are T-Motor Mini F7 Stack ESC… Xilo Stealth 1408 3600 KV motors… DJI Air Unit…Tattu R line V3 4s Lipo.
Will be using my DJI FPV goggles and the DJI FPV controller.
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If it’s the one that came with the DJI FPV Drone it won’t work unfortunately…
You’ll need this one:
To bind with the Air unit. Or a 3rd party radio with compatible receiver.
Awesome, look forward to seeing this go together 
Yup thats the one i have…cheers… tho i got the other one too for my dji fpv drone.
Oh, nice! I’ve liked the look of that frame for a while. Keen to see how you get on
Good old raspberry pi 
What you got planned for it? I use one on my ender 3 v2 running occtoprint 
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Thought it’s about time I got on with this wing, it sat in storage for a few years now, I can’t remember when I bought it.
Long storage has been a life saver as I discovered that the servo horns glue has failed. The horn was dangling on the push rod…
On closer inspection it’s just about visible to see the tiniest glue residue dubbed on “like 2 little spots”. This was an incident waiting to happen, not only was the glue rationed, the ESC blew when I connected the RX…the servos were not connected when it blew…
Stay clear of “AroStar” ESC’s…
Had to rewire a Tunigy 60A
The glue had failed over the storage period…
The clue is in the logo on the 3D print.
I thought someone on here might recognise it.
I run them on my Prusa Mini and Monoprice Mini in the same way.