Does anyone have a side saddle on their Mossberg 930 SPX? I am taking a class soon and the instructor requires one. I have a Mesa Tactical on my 590 and it works well. In researching it 2 years ago Mesa Tactical was close to releasing one for the 930 SPX but they don't list it as a product on their website. To further confuse me other vendors are selling the Mesa Tactical 930 SPX Side Saddles on their website but it is not listed on Mesa's site so I am not sure what the deal is. Either way I need a side saddle on 930 SPX to use it in the class otherwise it will be my 590. Anyone have something working for them?