Yes, I think you tuned it the best way 
I think Uniden 'tried' to include something about how to do this 'flatter tuning' in the service manuals for some Uniden export CBs.
However, I believe the instructions got corrupted in the Uniden document either due to typing errors or translation etc.
For example, on some of the 120ch Uniden boarded export radios that were very popular here in the UK the alignment instructions sometimes tell the operator to screw one transformer core to the bottom whilst peaking others. Then peak up the 'bottomed' transformer core.
This type of instruction is given for both Tx and Rx circuits. I think they do this to try and prevent over peaking of the Tx and Rx strips and to try and achieve a flatter tuning result.
However, I believe they typed up the wrong core numbers in the service instructions in some cases for the receiver alignment and this messed up the whole point of the exercise LOL.
I saw lots of badly tuned up mk2 Cobra 148GTL-DX radios where the radio got peaked up too much giving very low gain on the outer channels. This became even more noticeable when the radio was expanded to 160- 200 channels as the 148 then gained a reputation for being very deaf on the outer blocks of 40 channels.
The official Uniden alignment instructions for this radio have several typing errors some more obvious than others
Sadly I don't have the time to do this plus I'm not a very confident presenter/speaker and I don't really enjoy making presentations and I don't even like watching my own videos... 
However, at some point I may do a few videos about general RF theory to help people. I think a lot of the RF tutorial videos on youtube tend to dive into maths and charts and lots of 'terms' and this isn't the way to cement this stuff into the minds of the viewer.
