He has on a few occasions.
Part of the issue with guys like Snake Radios and Lester is the BS they convey at times.
These cap and wire upgrades are supposed to somehow give you more output power.
Lester is nowhere near as bad but he has lowered his standards of late.
To top it all off they replace the cheap caps with... well, cheap caps.
Lester and Snake Radios (MOSTLY lester) for example will take out a "Fujicon" cap and replace it with a "ChongX" or "Jwco" cap bought off ebay. Or it might have a "ChongX" and it gets swapped for a "Jwco" cap.
The "cap upgrades" are not "upgrades" - in some cases they may be "downgrades"
At best they are probably lateral changes. You went from a cheap cap, to a cheap cap.
And paid for the pleasure.