Try looking for it in ranges. The float numbers are not always exact . For example, the damage of the the cannon might be 12.7 in damage but you won't see 12.7 appearing. A way to do it is to range it. So instead of exactly 12.7 place "12.6~12.8" You might find the number to be actually 12.75. Also, don't upgrade it.
I tried it on the green scalex miner. The float value of the miner is 9.60. The number is exact and you can upgrade it. I changed it to about 1200 and I get 10k green resources per game