I found a Swiss made EREM micro diagonal plier at a yard sale for $.50. Self I says, this could work great removing tacks from the planking side. And it does with minimal to zero damage to planking. The diagonal jaws I filed a tad so that they get under the tack head sides with no or only slight disruption to the planking wood fibers. Heavily set tacks with deep hammer blossums are the hardest to avoid wood damage but it is insignificant compared to what a tack remover does. Just slide a piece of aluminum flashing under the diagonal after you have acquired the tack head positively and you get no depression in the planking as you roll the diagonals back to remove the tack. The angle of the micro diagonal jaws aids greatly in doing that angular twist to one side or the other while extracting the tack once you see which way the clench is angled on the tack. This minimizes interior damage to the ribs from the curved, clenched end of the tack as it is pulled out thru the rib.
I did a computer search to see if I could purchase new micro pliers by the same Swiss company in case I lost these. Found them and OUCH, at (as I recall) over $50.00 a pair, I'll use extra care taking care of and treasure my yard sale find!!!