SP-10 Mat


I have an SP-10 with a Micro-Seiki copper mat. Now that my system is dialed in in terms of room acoustic treatments and speaker placement I find the Micro-Seiki mat to be a bit too lively but outstanding in terms of dynamics and soundstage. The stock rubber mat is too dull and bloated.

Could someone suggest a mat that falls in between the two, leaning more towards the copper mat sound than stock but less forward in the midrange and treble.
jarrett
downunder, you might two large sections of a tape that won't leave a residue, like blue painter's masking tape.  The ends of the tape being the handles.  Even if some "stickum" is left behind that would be easy to clean off with alcohol.
@pryso the alcohol on copper mat surface is a disaster, must be avoided, it will leave sings that hard to clean. My experience was very bad. 
OK, what about Goo-Gone or similar cleaners, if checked not to contain alcohol? My point was simply there should be some means to clean off any residue it if remains.

BTW, what about a "Moscow Mule"?  That places alcohol in a copper mug with no bad results.  At least so far as the mug is concerned.  The consumer is on their own for results however.  ;^)