| In my experience doing low pressure mods to a spyder will work best if you're running hpa. The low pressure mods ability to function is also going to be complicated by the cold weather if you're playing outside. When I drilled the valve on mine I ended up having to cut the main spring about 3/8" because I went from shooting 280 fps to 350 fps and could not bring it even close to 300 with the rva. So, my guess is you're going to be shooting very hot unless you change the valve also.
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