https://www.amazon.co.uk/gp/product/B01KX0XUXA/ref=ppx_yo_dt_b_asin_title_o00__o00_s00?ie=UTF8&psc=1

After some dropper post/internal routing/pivots in the seat tube fun I took a punt on this!! Perfect for seeing what's going on and delivered in discreet packaging too 😉
Not top of the list of things I thought I'd be picking up this year, now where did I leave that picolax.....
Oooh! Let us know how it works.
an airshot or a compressor will help.
Works well enough, I now have said cables in the right place and a better idea where the holes in the frame are!!
Lol, pretty cool little gizmo that.
Got one of those as a gift a few years ago. Thought it would be a bit of a toy to play with rather than a tool. I was really really wrong. I have done so many jobs that I had done before by blindly jamming a wire/rod etc into places I couldn't see. I now do it with this in 1/4 of the time and 1/8 of the swearing.
Ooooh. Me likey.
Yeah I stuck one of those up my bum hole, aka seat tube fun. Thought it was really interesting.
^^ 😳
I was changing the head gasket on my motorbike last year, taking the engine stud nuts off. Yup....dropped one down into the crankcase.
One of them that I'd previously bought to see into a roof space for wiring helped no end, along with a telescopic magnet. The hardest thing is working out which way around stuff is. God knows how surgeons manage with it down your gob and that...
Video of your 'internal cabling' not required in this instance.