I am building a Dob and would like to upgrade my 50mm RACI from a 8x50 GSO to a 9x50 Stellarvue. However, I don't want to do this right now, but in a year or so. I'd rather spend my money upgrading EPs at this point. I am wondering, would I be able to use the same mounting shoe used on the 8x50 GSO or would I need to buy a specific one for the Stellarvue 50-60mm rings. I am concerned about drilling new mounting holes in order to switch mounting shoes down the road.