Installing my loom at the moment, its tape wrapped, floor is dead matted, not keen on drilling the floor for clips unless I have to, what and how have you done to secure the loom in the cabin??

From your bio on the left "A7" are you building an Austin 7?

If so how was the original wiring secured?

Appreciate times and IVA requirements are different, but that might be a start point.

Will you have carpet over the sound deadening?

If so can you lay the harness under the carpet. Maybe cutting channels in the deadening for it to lay in?