So I was digging around on Pirastros website and look what I found! It seems they have alternate (heavier) tension E strings for both the mittel and weich sets. Was anyone else aware of this / have you tried it?
Yes because those are the extension strings. They are used for C extensions and pirastros website doesn't make the distinction.
yep. For what its worth the medium E sounds awesome with the weich ADG. I personally didn't like the weich E and thought the full medium set worked fine. A spiro E with medium ADG is a decent mix.
I and many other people have done that. I thought the spiro was too bright for the evahs and didn't match. I like a consistent sound on my bass and found the spiro and evah too different. The evah light weak E was mostly a tension thing. The Evah medium E with evah weich ADG had the tension similar to a full spiro medium set. But what didn't work on my bass may work on yours.