Interesting. I know everything Dinan comes with a huge, huge markup. I wonder how much you'd be into this if you started with a $400 brand new LUK DMF and then had a reputable machine shop do the work. That would be interesting to see how much money could be saved.
A good part of the charge is R&D (or as we call it, trial and error! LOL). Just taking weight off is not hard, but doing it in a way to optimize performance is what you are after.
Now, if someone has a worn Dinan DMF to look at and we can compare to a stock DMF, then I think you can easily replicate for under $100 of machine shop time. I would probably select a shop that does a lot of race car work too, they would tend to be more familiar with the process IMHO.
Dinan Stage 3 suspension, SS jet coated headers, ESS SC kit w/ 1 range colder NGK's, 92mm pulley, 440 Big Greens, TTFS alpha N tune for meth, RK plenum plates, SBC Endurance Stage 3 Kevlar performance clutch setup, "Jed" lightened DMFW, open brake ducts, TEC cupholder, U.S.(Euro style) tilt/slide armrest, 6k HID fogs, Umnitza bi-xenon flamethrowers w/6k super white low beams, rear fogs, V1/Stealth1, dual head LI, 2.65 diff w/40% lockup/2x dynamic, compact spare, M5 logo trunk carpet, Euro trailer hitch, Mocal oil cooler, ACS type rear spoiler, Rogue custom SSK and tranny mounts, ST 355 BBK (fronts), BP sway bar brackets, Bluetooth retrofit, Speedhut boost gauge (20 psi), Dinan TB's and VS, KB BAP, Howerton/HFS-3 Aquamist WI trunk setup (50/50), with 2nd gauge in rear view mirror, aftermarket trunk mounted sound system integrated into stock unit (amps, crossovers, sub and speakers).......