Something I figured out while working as an AV installer: get a mid-sized bag and a smaller bag, and split your toolset that way. For me the split point is structural vs. signal, and I don’t need the wrenches and the multimeter banging around together. It also lets me grab only tools I need: if framing a room or doing a brake job, the big bag; if your stereo stopped working, the little bag (and probably the DeWalt case with either).
Also, if your town has a Grainger store (doubtful in Singapore?), they tend to have a good selection of toolbags at surprisingly good prices.
