Hi Kick, that is looking so much better now.

Just wondering if you were using full strength black stamp pad ink as I reckon it should almost cover the last bits around the bottom edge behind the control knob section. For the vertical glue join line maybe use a very fine paint brush to delicately brush into that line a full strength dose of the red mixture. Being water based hopefully that allows you the opportunity to wipe off any unwanted excess.

Cheers Waz