indoor tc track corner markings, help!

[catman79]

we currently run on an indoor track, using square drainpipe as our main track markings, our main issue is the corner sections, were currently using thin plastic strips with a block of wood on each end that slide in to the trunking. it surves its purpose but doesnt look all that great, also hairpin ends, we use old motorbike tyres that get moved all the time.
looking for peoples suggestions / ideas as to that you use at your local club.
any advice would be greatly appreciated.