This might be a bit long winded so apologies in advanced,There is no easy answer here.first crossovers are not easy to begin with i would discourage it.I have done both from SGC to PSA and PSA to SGC.Both weigh thing differently.on top of that its very hard to see the card through the slab only slam dunks cross.
I did several SGC to PSA cross overs,only 1 of 7 passed,i also did 10 PSA to SGC crossovers for a 87-88 fleer basketball graded set in 8 or above in SGC.Im close to finishing and got impatient waiting for SGC 8 or above to be listed,the only one that crossed was a PSA 9 that ended up an SGC 8.
So i would just recommend cracking and subbing it raw,Ive had good luck snapping SGC cards and getting the same grade from PSA,Ive also had good luck snapping PSA to get the same grade at SGC.One thing you may want to consider is why its a SGC 9,corners,centering,surface,edges?SGC is harder on somethings than PSA and PSA is harder than SGC on somethings.
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