Tried using 6 layers of carpet to simulate deer hide....same result blades DIDN' T open until 1 inch into carpet.[

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Next tried 6 layers of foam underlay(nice soft stuff) still same result blades didn' t fully open until 1 inch into the underlay(about 4 layers).[

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Any other things to simulate animal hide???
I am using Rocket rubber bands but I think they are for the Miniblaster, would this matter???