Following UTTD #4 I enquired of Hasbro thus:
I was wondering if there are optional rules for playing twister with groups of people with different numbers of limbs? For example, where one person has four limbs and another has three, or where one player has a spring instead of legs.
I received a very prompt response (kudos to Laura from Hasbro UK) which helped greatly:
Thank you for your email.
As with all games, you are free to make up your own variations. If you were competing in an 'official' tournament along the lines of the Monopoly World championship then you would be expected to follow the 'official' rules, but outside of that you should feel free to discuss and agree sensible rule variations that suit your individual circumstances.
May we thank you for contacting Hasbro and if we can be of any further assistance, either now or in the future, please do not hesitate to contact us again.
So, for Ultimate Twister Destiny Duels I propose an addendum to the rules along these lines:
In the instance that a competitor possesses non-standard appendages, a new spinner shall be constructed wherein his/her attributes are wholly accounted for. For example, should a competitor possess a spring instead of legs, a spinner should be devised that equally comprises coloured segments for the three contact points; left hand, right hand, spring.