Finally got into "Burnt Weeny Sandwich" eh?
In a few weeks, you'll be bolding "Thing Fish". Seriously though, I'd suggest revisiting both "Uncle Meat" and "Weasels Ripped My Flesh" but those 2 generally seem more jazz influenced, whereas "Weeny" leans more in the classical direction. "The Grand Wazoo" and "Waka/Jawaka" are a couple other successful mostly instrumental sets that might be worth revisiting, especially the former (both are pretty jazzy but that one is better and has slightly more of a classical influence). But knowing you, it might be best to just make a comp of early instrumental Mothers/Zappa.
Still haven't gotten around to "Get Your Leeds Lungs Out" huh?