Rod , I also , like Ned purchased the front chock ( mine from Aldi , they sold like Hotcakes),
I have only recently, through Saxons Spares and Klompenstaanders assistance fitted a replacement centre stand.
however whilst sizing up the chair on the side , I used the front chock ,
finding it OK but very nervous with its sideways instability, more due to movement of the wheel in the cradle.
The LT weighing in at approx 283kg . slightly heavier than the RT and RS.
And as I suffer from a permanent neck injury, found it difficult to remove the bike from the stand.
when pulling backwards, the forks extend making for an awkward roll off the bottom cradle.
other members with better physical ability may find this manouvre easy.
Neds would be of a superior quality, and there are some more specific to either K100 or tread size .
Check them out, might be the way for you to go.
My best recommendation though is to find yourself a Klompenstaander..
they are cheap , effective and friendly to use.
cheers Ed.