I modified the Tamiya anchor pieces by thinning them and filing the slots to accept a scale 2.5 inch wide belt instead of the 2.0 they normally accept. Top ones are roughed out; bottoms are "factory" sized slots.
I machined these buckles on my mill. The kit parts would lose integrity if they were widened to accept the wider belts I plan to use. They are in primer here ready to be cleaned up.