Will I notice improvement with crossover mods?

Mitchb.. they are the same, PIO stands for Paper in Oil. The caps you have ordered are Silver PIO Mundorf Supremes.The next stepdown are the Mundorfs Supreme Mcap,3rd are Mundorf Mcap-Zn and 4th on the list are the original M-caps(the primary caps used in Sonus Fabers).

Gmood1...The 3.0mH inductors from North Creek AWG10, DCR=0.17 (which I used) go for $74 each. AWG 8, DCR= 0.1 at $127 was too rich for me.

The stuff about inductive high pass filtering was on the Audioasylum Planar forum, a posting about MMG.

The zero ohm coils may use quite small wire as they appear to use some type of magnetic core material.

The Jantzen inductors tempted me, but in the end I was swayed by Magneplanar's (and others) recommendation to avoid foils.
If I do make an inductive high pass filter for evaluation I think that foils, probably Jantzen would be appropriate.

I hear ya Eldartford..that's one reason I went with the Jantzen copper foil inductors. They are reasonably priced and claim to have almost zero FM distortion. They really opened up the Magnepans. It's tough to compare the stock Magnepan inductors which weigh maybe 14 ounces together..two for each speaker.To the Jantzens copper foils of the same value that weigh over 6 lbs ! Huge difference in weight and sound!

After all said and done I'm getting Dynamicaps for the tweeter/midrange and solen and Axon for the bass. I'm getting Alpha Core coils all around with different gauges 12 ga for the bass 14ga for the midrange and 16ga for the tweeter. I'll be using Mills resistors all around and will be rewiring the speakers with Cardas chasis cable of three different gauges to each driver.I went this direction as the parts are known to be of good quality and I'll have them in two days and I should have my speakers back in my living room hopefully within the next week. The Mundorfs were only available in two weeks and there would have been a week of shipping. I couldn't wait any longer. The Sonicaps were considered but would have also been a several week wait. I'm sure I did OK. The one thing I am doing at the reccommendation of someone is putting single caps of a value where possible as opposed to cascaded caps of lower values. This is only done in a few places and was highly reccommened by Michael Percy who is where I am getting my parts from and I get the impression he really knows his stuff. Jeff at Sonicraft is brilliant and had terrific Ideas most of which I didn't fully understand but he knows his stuff. Unfortunately the wait. As for all you Americans, Andre at e-speakers is a really nice and helpful guy but is no longer distributing to Canada as Canada has it's own distributor now being Audyio Sound in Canada and they were extremely helpful as well but once again the dreaded wait.The website for Audyio is www.audyio.com They are online dealers of audio parts with Mundorf soon in Canada.

I should note that the Canadian on line dealer is www.audiyo.com I miswrote.