Can a person gain length as easily pumping with an extender as just with extending?

[Magic Johnson]

For ppl who've gained a lot what do you think?

Just to clarify i mean pumping on the same day, not wearing an [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extender[/words] then putting it into the pump tube.

 

[Shenlong]

Pumping will have some length gaining effect anyway so I doubt doing both on the same day would be detrimental.