Real Recommended Paddler Weight & Design 4.28-4.5m

Surf Ski & Kayak.

Let's take for example the plastic EPIC V5 & V7.

The V5 is :
Length: 14' (4.26m)
Width: 23.6" (60cm)
Depth: 12.6" (32cm)
Capacity: 280 lbs. (127kg)

The V7 is :
Length: 17' (5.20m)
Width: 21.25" (54cm)
Depth: 14" (35cm)
Capacity: 297 lbs. (135kg)

What is the maximum recommended weight for these two surf skis ?

The maximum capacity of 127 kg & 135 kg is obviously overstated like in the case of all kayaks / surf-skis. Maybe these boats start to behave poorly at over 85 kg for the V5 and over 90 kg for the V7 ? (around 50% less than the maximum is the real maximum)

Do you think i am wrong ?

Moreover what is the fastest boat you can think of for a maximum of 4.28 - 4.5 meters long ?

How narrow in width can you go on a 4.28 - 4.5 meters long surf-ski / kayak to make it fastest for its length, by controlling the buoyancy with the help of depth and what kilograms would that boat be able hold in the end ?

(all epic boats go from 32 cm to 35 cm in depth max)

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Examples :

Mysterious boat specs 1 :
(based on V7 but with 4.5 m) :

Length: 14.76' (4.5m)
Width: 21.25" (54cm)
Depth: 14" (35cm)
Capacity: 220 lbs. (100kg)

Mysterious boat specs 2 :
(based on V5 but with 4.28 m and V7 width)

Length: 14' (4.28m)
Width: 21.25" (54cm)
Depth: 14" (35cm)
Capacity: 198lbs. (90kg)

If my math regarding capacity is wrong please correct it.
I only made a[approximations.

If you have better ideas regarding 4.28m - 4.5m fast craft please write down.

Thank you.

Or do you think a shorter boat should look like :

Mysterious boat specs 3 :
Length: 14' (4.28m)
Width: 22.44/22.83" (57 or 58cm)
Depth: 14" (35cm)
Capacity: 220lbs. (100kg)

Mysterious boat specs 4 :
Length: 14.76' (4.5m)
Width: 22.44/22.83" (57 or 58cm)
Depth: 14" (35cm)
Capacity: 242lbs. (110kg)

So 57 or 58 cm instead of the 54 cm ?

Which design would you find superior or more interesting ?