For the MKH70 i’d recommend:
Description: Modular Windshield WS 6 Kit
Order Code: 086006
Web link: www.rycote.com/products/086006
To use the Schoeps CMC6 in the WS 6; You can reduce the size of the Windshield by removing the extension body. This will bring it down to the size of a WS 4. You may also find that you have to swap the lyres over to the softer shore to use with the Schoeps CMC6. It will still be a little large, however it will be usable.