Just got my second D&C insert. I thought about getting a 7RP but I really wanted a more cost effective alternative and since my D&C insert for my K has worked just fine, I stuck to the same choice. Here are my B30 and K32 with D&C inserts.....no problems with strange marks and my K has had the insert since I got it. Hope it helps!
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I have Mai Tai inserts for my K35 & Picotins.
I could use more
To get to the point[emoji41], your D&C inserts look terrific !
Can you please let me know their web address since I cannot find it?
Sorry for my ignorance [emoji37]