Your confidence made me curious so I swapped out my 3160 and put back the 7260 and tried the unofficial driver. It's actually much worse. With the 7260 using various 'official' drivers, I used to get 5mbps to 9mbps -- now with 'unofficial' driver I get 4mbps - 7mbps at most.
It's a testament to the wretchedness of the 7260 how for every person who THINKS they found a solution, there are countless more for whom it doesn't work. I must have encountered a dozen "I think I fixed it" declarations in this thread and elsewhere and these claims are NEVER followed by "You sure did--thanks!"
Needless to say I quickly reinserted the 3160 and am thankfully back to 20mbps--25mbps.
People -- give up. Intel has. They refuse to recall this garbage and are stringing you along with updates and suggestions that make no significant difference. Get another card and get on with your life. If your laptop is one that whitelists, find out which ones are allowed and grab one. They cost very little and between ebay and amazon and newegg, you're bound to find it. Best of luck.