Looking at trying a 1 piece scope mount on my new AR10 6.5CM project. Scope will be either a NF NX8 or might splurge for the ZCO scope. I see the Sphur 1 piece units which are priced like they are gold. Are they worth the $ or what other one piece do you all like? Should I get something with a 20mm MOA rise built in since it is an AR platform? I want to be able to shoot up to about 1000yds. Thanks!