B1 Korg thump on turn on etc..

and input selector noise... On another note, noticed these on my build. zis there a way to ameliorate these. Read in the B1 Korg about a 1M r across the selector switch but how would this be implemented?
And the turn on thump was with my amp. in standby mode, can this be dealt with?

The preamp is for a friend a nd I guess he would be lind of scared with these aspects.Thanks.