(partial hanging)How to find sweet spot while sitting down

[GrantMyWish]

Im doing the partial hanging method.Im able to get the sweet spot while kneeling down.but how to get the sweet spot while sitting down.it is much more comfortable sitting down

 

[I'm un a mess]

It is impossible being sitting down i think

Edit : may be make a goods lift

 

[Blackjack]

Im doing the partial hanging method.Im able to get the sweet spot while kneeling down.but how to get the sweet spot while sitting down.it is much more comfortable sitting down

Not likely to succeed. Might I suggest researching another option.