Yeah, Tod Tedeschini (I believe that is his name) Is one of the best Medieval crossbow manufacturers. He makes really high quality pieces that are historically accurate down to the tiniest details (As can be inferred). He's also built Ballistae!
I believe that some of his crossbows appeared in the miniseries "Wolf Hall".
Tod also makes high-quality reproductions of Medieval swords and daggers. IIRC, Tobias Capwell (Who is the curator of 'arms and armour' at the Wallace collection) gave high praise to some of his reproduction swords, comparing them to the original swords held within the collection.
Some of his bollock daggers appeared in the Netflix movie "Outlaw King."
All in all, this video should hopefully bring in some publicity.
Hopefully, He decides to make some historically accurate sling reproductions and sling bullet reproductions to sell on his website which can be found here.
https://todsworkshop.com/pages/historical-weapon-replicas.
I believe that Tod is also planning on making a video on how to make slings, and later on might make a video on Staff slings.