K4700 Speaker protection : Longer Delay time?

Kits Audio Hi Fi Projects
1

Hi, I am new here, I use K4700 Speaker protection for my tube preamp & I want to make starter delay time longer than defaut 6 seconds. (to 25-30secs)
I have another speaker protection kit & I have changed one condeseur capacity to 4-5 times bigger one (100uf to 500uf) & successed to make starter delay longer time like 30 seconds.
I am wondering if I change to bigger cap, specially C11 from 220uf to 600-800uf, Can I make it ???

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2

I found some infos on DIYAUDIO forum.
https://www.diyaudio.com/forums/solid-state/265863-regarding-velleman-k4700u-speaker-protection-kit.html
Anybody tried to modify C11 ???