Hi Everyone
Currently, my espresso set up is Delonghi Dedica espresso machine and Eureka Mignon Manuale. Cannot seems to get the taste of espresso right even thought I can get 14 grams ground coffee and 30-32 grams espresso output in 30-35 sec. Coffee always seems to taste a bit bitter and need a bit of sugar in my latte. Suspecting bitterness due to over extraction due to 15 bar brewing pressure specified for the Dedica.

Contemplating upgrading to one of the following:-
1) WPM KD-210S2 and mod to add an OPV to set the brewing pressure to 10 bars

2) Milesto EM19M3. Conflicting information; J Coffee, the local supplier, says machine is spec at 15 bars but brochures in alot of Chinese web site says 9 bars. A Singaporean wrote in Reddit to says his dealer confirm pump is spec at 15 bars, however the OPV was adjusted to 9 bars

3) WPM KD-310 and mod to add OPV to set brewing pressure to 10 bars

WPM is a rebadge of Sunbeam (EM6910 and Torino, respectively) in Australia and in their forum those who had added an OPV to their espresso machine reported thicker, creamier and sweet espresso coffee extracted. Tikietic have you mod your KD-210 ? Where did you get it done ?

However, regarding Milesto I am not able to obtain much information from the internet.

Which upgrade root should I take ? Opinions from Kopi Sifu highly appreciated.

Tqvm. I was extracting Arabica dark dry roast becos I like the fragrance. Will try with medium roast

I owned the grinder for 2 months. Yes was extracting with bottomless portafilter with a non pressurised basket. Tqvm

Tqvm. Will try as advised. Cheers

Concurred regarding Milesto

My guess are you are referring to Milesto. You may be correct. There is not much information regarding these machine. Could Lowyat forumers please help to provide more info.