Modifying the strobe is as simple as replacing a single resistor on the board. The strobes come from the factory with a 10 Meg Ohm giving a flash rate of about once every 3.5 seconds. I initially replaced mine with a 2M and that sped it up to almost twice per second. I then knocked it down to a 100K, but that change was hardly noticeable. It remained at just under twice per second. I only have a dozen or so strobes in a single tree, so this should work out OK for me.

There are 2 different board layouts I have come across. Here are pictures of both highlighting the resistor location.

Start by removing the circuit board from the housing. The globe unscrews, and the board is held in place with some glue. Dig that away, and the board will slide out. Then simply replace the resistor taking care not to damage the other components.