Hi. I use an extended platform and a magnetic platform. I think the magnetic platform might be the same size as the regular platform so I placed the frame on it to see if it would fit and it did but it was a very tight fit. I don't know if this will help but I use my B.S. daily and have gone through 6 pairs of cutting pads in one year because of such intensive use. I started out with the regular platform and switched to a extended platform. If you can afford it I would suggest adding the extended platform to your supplies because it makes it a lot easier when you have dies that fit tightly on the regular size platform. Also, if there is any slippage at all it is much less with the extended platform. Using the extended platform is a lot easier all the way around. I hope this information will be helpful for you. Have fun!