We use Peco HO 75 track, which consists solely of flex tracks. To lay the flex track we use a couple of helpers like:
- A carton, cut in a circle of the desired radius, to lay circles
- A wire connected to a center pin, to lay circles
- A flexible plastic strip, to mark non circular curves
- A 15mm aluminum U strip, to lay straight track
- Different lengths of hardwood, to lay shorter pieces of straight track
- Track spacing jigs, to lay multi track stretches with high accuracy constant spacing
This is the link to video Twinwoods & Bedford - 11 - Laying Flex Track
