I suggest this because lots of people want to remove explosive from their pickaxe but there is sign to remove it.... Place it under the explosive sign would be helpful!!! "With Refund!!"
Support, many players end up not liking what explosion does within the mines. Since there is no clear indication that it will pick up blocks randomly and dump them into your inventory you can essentially slow down your revenue per hour without realizing. It would be nice to have it cost absolutely nothing seeing that you have to spend 5 tokens just to get 1 level. If a compromise is to be made, maybe a token to remove a single level or 5-10 to remove all explosion.