I find it kinda difficult to do it stretched out + it makes it similar to the usual wet jelqs. I feel like I need to put lot of lube + water to make it as smooth as I can. + I remember JP said I should do it 20%-40% erected and feel like I fully stretch my penis upwards.. But in 20% erection u mostly pull the skin.. so I find myself use my other hand to pull back the skin downwards every jelq.