I just ordered 6 XM-L's and 6 XP-G's on 20mm stars (with various drivers, both AC/DC and DC/DC) as a way to experiment and learn about wiring different numbers of LED's with various drivers. Is there a good way to temporarily mount the LED's (for heatsinking purposes) so I can change them out in order to experiment with different configurations? In the future I'd like to mount them permanently for various fixed lighting projects I have in mind.
I don't need to run them for long (a couple minutes max) and I'd like to be able to drive at various levels but no more than, say, 70% of the max. I could run them at a lower current without needing any heatsinking other than what the 20mm star provides but I would be worried at higher currents. The other option I see is to buy several small heatsinks that are pre drilled for 20mm stars but was hoping there was a cheaper option.