The only bit I don't necessarily agree with is suction due to turning the tap off causing the needle to stick worse - there is a hole in the primer that will let air pressure out.
I use 98 with semi for full synthetic oil as well - the Victa's don't complain, and my starting procedure is identical to yours.
That being said, 98 shouldn't be a requirement for one of these to run - I have had very little success convincing others to use it. And I can guarantee a potential customer would balk at the requirement when a Briggs will run normally (which is to say quite averagely) on 91.
What they don't know is that most of there whipper snippers and leaf blowers are supposed to run 98 Ron as well (the manuals all say 91 r+m/2 - which is the american method)
Powerfit Semi synth oil is at bunnings for $10 a litre bottle - best price for semi-synth 2 stroke oil I can find. I used it when it was branded Ryobi and it seemed fine.
