1. Let's heart some specifics on what plays so bad? Saying that with no facts means very little. Especially since you said you are a low level player. Please also include the mechanics name that performed the work on the tables your are speaking of. I know how my rails play and installing the cushions properly/ doing the facing work is very very important.
2. Why would it surprise you that I would do what a customer asks me to or better yet: Pays me to? Like the OP (who is now rethinking this and thats great). I give customers options and they choose. I am not going to turn away a sale because a client does not want to spend the extra money. I also am not a firm believer in the amount of QUANTIFIABLE difference from my experience with using the modern cushions as a direct replacement<<<<---- what Brunswick will tell you when you call and ask what cushions to put on an Anniversary or Centennial or older GC.
3. Unless a customer PAYS me to do so, I do not like altering the Anniversary or Centennial restorations because I want them as close to all original as possible. Yup and as long as they still work properly: i even prefer the figure 8 nut plates on the bottoms of the rails.
As for the OP getting the railwork done, I am a bit confused why he is asking for other peoples info is he is that close to MG?? Should be a no brainer, even if it was more money. But, if he wants other peoples info, this is who I suggest: Jack Zimmerman aka BilliardMechanix (812) 756-2899.
Good luck to the OP!
TFT
p.s. I am not a firm believer that there are many people on the planet that 1 extra rail back and forth would make a difference to. Not to mention I have ever seen a new GC6 or Diamond do 5-6 rails back an forth lengthwise.
To start out your customers who say they "play fine" with incorrect rubber may not know what a properly playing table plays like. I have walked down a line of Diamonds at tournaments and each table plays the same on 3 rail kicks, something that you dont see on Valleys and definitely wont see on GC's with the wrong rubber. The biggest issue when putting K55s on Monarch tables isnt that you shrink the playing field by 1/4", Im sure nobody can tell that the play field is a 1/4" small without measuring, its that the table loses its 2:1 ratio. It will no longer be twice as long as it is wide which is a big deal on every multi rail shot, the more rails the bigger the discrepancy. The other good reason to have the rails modified is that on old tables the pocket miters tend to not be very accurate. If you are going to build a truly "nice" playing table the pocket miters need to be fixed. Many people also consider a "nice" playing table to have current common pocket widths which is 4 1/2" now, not 5 1/4". When using the correct cushion for the table you generally maintain good speed,
I have seen K55s on GC's play very slow, 4 cushions up and down the table with Simonis 860 I would consider very slow, 4 1/2 I would consider normal, that way you still get 4-4 1/4 lengths when very humid and 4 3/4- 5 lengths when table is playing very fast. If your customers are happy with tables that wont take a shot with pace down the rail into a 5 1/4" bucket you are lucky, most players who know better expect to be able to make that hot on a 4 1/2" pocket properly set up. I think the bottom line for the OP depends on how he uses the table, occasional play on weekends and holidays with family and guests using the wrong cushions dont really matter. If he wants to practice to improve and shoot tournaments he will be happier spending the extra money and having the sub-rails modified for current profile cushions, correcting the pocket miters, and properly extending the sub-rails for tighter pockets.
P.S. Why did they quit making Monarch Superspeeds??? There sure seem to still be a lot of tables out there that have them.