Read with great interest all the lead issues as it relates to your blood level. Mine last year was 6. 12+ months later it was 11. I do shoot some indoor ranges mostly new ranges with so called state of the art ventilation. 2 matches outdoors a month and 1-2 practice outdoors per week. SO I purchased a lead test kit from Lowe’s. Per directions the following results, rubbing test strip on a lead fishing sinker test turned med- dark purple, definitely positive, no surprise. Next the wooded plywood sheet with my dry media tumbler and my squirrel cage media separater reside no lead present, test strip stayed white. Went over to my Mark7 1050 unit ran test strip over the plastic guard and on the aluminum base, positive lite to medium purple/reddish. Just thought I would put my results out there. Comments welcome. Thanks....