I messaged Simon to relist the DTP Boards that he used to sell, and he did 
here is the link 3.95€ |16mm * 1,6mm 3535 DTP kupfer platte MCPCB für XPE XPL XPG 519A LH351D SST20|plate|plate copper - AliExpress
you can place an order an Leave him a message that you are from BLF forum and he’ll give you a 15% discount
1.04-0.15= 0.88 Cents a piece :+1:
does he have 20mm as well?
yes, he added them too, 20mm XP 4.01€ |20mm * 1,6mm 3535 DTP kupfer platte MCPCB für XPE XPL XPG 519A LH351D SST20|plate|plate copper - AliExpress
and 20mm XM-L 4.0€ |20mm * 1,6mm dtp Kupfer mcpcb für xml2 sst40 xhp 50,2 x PS 50,3 LED|plate|plate copper - AliExpress
That is very attractive pricing. I might pick some up. Thanks for prompting Simon to relist them!
These look to be made with a different process… stamped instead of cut from the sheet? Is there much of a performance difference between using one of Convoy’s vs a Noctigon or a Kaidomain mcpcb?
You’re Welcome!
The only difference between these and the noctigons is the Gold plating, Noctigon & KD boards are gold plated, but Convoy Boards are not.
I use them too, and I can confirm that they are Direct Thermal Path
more details here
https://www.fasttech.com/forums/6222001/t/2580922/direct-thermal-path
Yeah, I don’t doubt the DTP part. It’s just how the bottom looks - it’s not as smooth and flat as some others. I was wondering if that would have any measurable impact on heat transfer.
I have 16mm Boards and they are Perfectly flat, I don’t know about the 20mm ones, I’ll update you when they arrive
you can always sand on 600 sand paper to get them flat or even polish down to 5000
Yup, true. I think I’ll order a set of each XP size to check them out. For that price, you can’t really go wrong.
Lapping does wonders in the world of CPU heatsinks. I don’t see why it won’t work on copper boards for LED, which are easier to sand.
I ordered some.
On November 27. 2017!
Hope they will find their way to me, soon
Is there pre-applied solder on the dtp board?
yes the boards are with very thin layer of solder, but you should get more on them when reflowing
Ok. Thanks, Lexel. What do you suggest would give the best result? Isn’t it better to just remove the thin layer and apply a new solder?
Its a VERY thin layer, there is no way you could remove something with soldering iron maybe only by sanding and that would destroy the star.
Get yourself soldering paste, put small amount under the emitter and on each contact that you are going to use for soldering wires later. Works nice every time…
Yeah, I was thinking of completely removing the thin layers with soldering wick, as you heat the board with something like a temperature controlled slow cooker…then apply new layers of no-clean, leaded solder paste.