hello again
for tips , you can check spintastics website which has the "trompo grande" tip with bearing
on this top in the video , it originally had just the plastic bottom of a trompo with the standard bearing
after a year of use i had broken that part , my friend philippe turned a new bottom to receive the shaft and bearing, in a very hard wood (cormier)
it now has 2 bearings and hasn't broken yet
the top itself is hollow made from just one piece of beech wood(over 10 year old heart of log)
on my other big top i had the tip turned by a professional , it's made of brass and receives 2 standard rollerskate bearings
it spin less long than the other one but feels a lot more solid and stable in hand
that's it
jim