Hi Richard
Your assumption is correkt; the K-guard will fit right up against the wingbar ends, as shown in Pic 04:
If i take two halfs of your kayaks and and add the 2 cm space in between plus the with of the base of two half k-guards my result is (2*36+2+30=104cm) if you by the 135 cm wingbar you will have (135-104/2=15.5 cm) to spare in eatch of the ends.
View attachment 31588
Our setup as shown in Pic 01 carry two kayaks with a with between 55 and 60 cm. (also shown on previus pictures - 2016)
In our setup the distance between the two K-guards is app. 10 cm. If i move the K-guards to eatch end of the wingbar the distance between them will be 36 cm, as eatch one gives an ekstra space of 13 cm when moved - as shown in Pic above (which only show the one K-guard moved to the end of the wingbar).
View attachment 31589
The mesurements of the K-guard on your skech is correkt, eccept the 17 cm from base to end of K-guard: this is only 15 cm, and the base is 30 cm wide.
Please note that the total weight of the two kayaks and the roofbarsetup must not be more than 50 kg.
Please note that my wingbar is 127 cm, whitch is the precise length of the alloy bar.
I hope this answers your questions.
Best regards
Henrik aka. hejh2o