Hello nc50lc. I know RBF but I am not interested in, I thought OP was clear
Did you read my post ?
I clearly stated that you
should be able to create a double-spending transaction (which won't be dropped by all nodes) if the RBF-tag is set.
nc50lc just mentioned that this should work if the RBF-tag is set in your original transaction and if you are using a compatible wallet to do so.
So, actually.. you should be indeed
interested in RBF.
If you however want to double spend a transaction which does not have the RBF flag set, your OP wasn't clear at all..