I have a Rock Chucker Supreme single stage press. I have owned it for about a year with no problems. My only complaint is it’s slow. I can do about 75 round of 9mm and hour, 357 and 44mag about 50 an hour. The press is rock solid, just slow. My question is should I get the Piggyback 4 conversion for it for about 300.00 dollars at Midway or some other progressive press? The Piggyback 4 claims 400 round per hour. I purchased the Rock Chucker for 249.00 at Midway. I feel I should stick with the RCBS because everything I have will go with it. If I buy another brand will the RCBS just collect dust? Does anybody have any experience with the Piggyback system?