yeah - it's pretty narrow - I've had my share of strings that wasn't long enough or started to get thinner before the actual headstock
I for one can surely voutch for the following strings
Rotosound Swingbass - super long scale 45-130
Dr highbeams - Extra long scale 45-130
Dr red devils - Extra long scale 45-125 - tight fit but it works on my läkland skyline 55-01
any other brands that will string through body on a 35'er ?
I know for a fact that elixirs extra long scale actually is more like a 34" - the B string isn't long enough to pass the nut, and the E-string actually switces mid-nut