Tuning Steoger XM1 fill issues

Hi all,

Steoger XM1 has a smooth bore fill port and a quick coupler. I continually get air leaks with both hand pump and compressor. I assume it's related to O rings on the fill probe, but could it be anything else? Is there anyway to mod the port to receive a better fill probe?

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image1.1649262020.jpeg


thanks