More of the blind leading the blind. Where do these guys get their setup information from? Maybe ask Huevos since he wrote the code for the blindscan plugin?
https://rickcaylor.websitetoolbox.com/post/octagon-sf8008-ku-blindscan-9956462
Here is what user Defined Settings for a 10750 lnb should look like:
LOF/L = 10750
LOF/H =10750
Treshold = 10750
22KHz tone = OFF
Other settings may work, but the person who wrote the code says what is listed above should be used.
I'm not a member so I can't tell them to try the Satdreamgr-6 image for the sf8008. If the Octagon is anything like the vu+ zero 4k in my opinion Openpli and Satdreamgr has a faster blindscan and more stable picture than the OE images. I don't think any one here has an sf8008 to see the difference.