Hi early21…got loads of heavy songs …just dont think I have the voice for them so put them on the back burner, everytime I tried to change the bass it seemed to spoil the run of the song so I took the lazy option and left it on the same note which, strangely worked…gotta admit it never occured to me to put some sort of “bass fill” on the IV chord ( I’m assuming you mean the end of the 4th bar) I’m stupid like that, seems so obvious now…
best to you for the coming year, Kevin