Just ordered a Cobra Sidewinder seat. There are cheaper oners but I looked at this in detail...
As below in grey/black. The back is plastic and glossy. And will have a RC reciever hidden at the top behind it. And a bright red LED as part of the lighting. And its strength and its headrest will protect me when I flip it... Backs are replacable and in many colours/carbon fibre etc.
The seat back alone is only 5.6kg according to Cobra.
The back is wider than most other car seats, because I am fat and need it wide!
The base will be sold on eBay and I will be only using the back. My usual Jay2 gel cushion (or any mobility pressure type cushion) will be used.
The back mechanism is left and right handed, and so has a adjuster each side and the mechanism is strong and doesent creep back or forward like some.
It looks pretty and thats half the reason for this chair. And if it works out well will retrofit all of my chairs to match...