This is a tip for the expert in SB including & more importantly the newbie.
I was able to reach the stage of untying everything & releasing myself from my spread eagle on my back position whilst totally blindfolded, & I mean absolutely no sight.
This is because I've tied myself this way thousands of times over the decades & always precisely the same way with the same rope lengths & most importantly, the knots.
This method of routine has afforded me the ability to easily & quickly release everything starting with my wrists which are tied to the lower headboard rail & side posts of the double bed.
The rest is a systematic set in stone releasing of my knees, waist, neck, rear of head harness & lastly my ankles. Of course once my wrists are free I usually remove the blindfold, but my point is I wouldn't be able to include a blindfold & securely tie my wrists if I couldn't release them first.
I would thoroughly recommend anyone who self binds become totally adept in releasing all they use whilst blindfolded, it could someday save you, not only your life but embarrassment.