A neat cheap little 50m range (checked true) measurer, would it be
possible to change the f crystal to hopefully f/3 or so and get 150m range.
Assuming (looks possible) to split send and receive and enlarge the 15mm
capture window to 150mm window.
Also assuming I can identify which is the crystal and is not integral
with the ASIC, not epoxied over anyway. Would the LCD likely become
unreadable at 1/3 the original drive f. Accuracy would be worse but
decimeter resolution over 150m would be fine