is there way to lock in the write speed ?

i mainly use Taiyo Yuden 4X disc which with my BenQ burner which will burn at a max of 16x which is great but i dont like burning max i usally use 8x ,

These TY's while they say 4x will burn at 16x for me , i would much rather burn at 8x .

SVCD2DVD only gives me the options 2.4 and MAX ive tried setting the write speed with the disk in my burner and withit out ...

is there way to lock in the speed i want in SVCD2DVD or can this be added in a future build