The weight of that arm, which I envy you for having, is going to be important when it comes to choosing cartridges. For the last two weeks, I've been using a Shure SC35C conical "DJ" cartridge and I strongly recommend it. The VTF with the stock stylus is 4-5 gr., but if that makes you uncomfortable, the N35X stylus works in the SC35C body and tracks at 1.5-3 gr. I've used the SC35C in a heavy vintage Rek-O-Kut S-120 - with the stock stylus - and in a very light DIY linear tracking arm using the N35X stylus. Your arm fits somewhere in between those two arms and I'd be very surprised if that cartridge didn't work well on your arm.
Thank you very much to Doug & all the other contributors of this post for all the usefull answers, drawings & others informations!
I just bought an old house and had a lot of big work (quite far from delicate tonearm adjustments...) to do during the last months. The big part of the work is now done & I'll have more time to go back to my turntables.
So I'll statr with the BJ tonearm setup, and give you a feedback + take some pictures as soon it will be ready...
Thank's one more time to all of you !!!