If you want to try your luck on the officer not showing up, that's about as good as you are going to get. Nowadays, the odds of an officer not showing up for their court date is about 5-10%. It all depends on how much time you want to potentially waste on your case.
Just know that you won't get ANY further reduction----you already received a VERY sweet deal. After all, you could have been charged with stunt driving, had your car towed and impounded for 7 days, plus had to pay thousands in tickets. Why would you think you can get any better of a deal? Your odds of getting any further reduction are about 0.5%!
Of course, be aware of a further risk: if you go to court and want them to parade the officer in just so you can make up your mind on how to proceed, you better be willing to pay your ticket on that day outside of court. Otherwise, if you are planning to plead guilty IN court, then many prosecutors will seek an 'amendment' on the speed BEFORE you are arraigned---so that you'll be pleading guilty to the 'amended up speed'--in your case, 135/80 (55 over!). After all, if you are going to waste everyone's time by requiring them to call in the officer, only to plead guilty----they aren't going to give you ANY breaks. Such amendments are the norm whenever you go to trial on such a case, but many don't know that such a amendment request can also be done before guilty pleas are entered.
You see, the way it works now in may areas is that while officers are scheduled for specific court dates (and usually have multiple matters on that day), the officer will not automatically come in to court right away in the morning. Instead, they are on standby until they are emailed or texted to come in to court. That way, officers aren't just sitting in court all day doing nothing. This way, the prosecutor can simply let them know when to actually come in to the courthouse when they are certain the matter is truly going to trial. Most officers can then be in court within 15-20 minutes and the prosecutor calls that case when they are ready. This avoids wasting the officer's time by having them come in to court when the person is actually just going to pleading guilty or ask for an adjournment.
So, if you don't make up your mind BEFORE court starts and they ask the officer to come in to court, they aren't going to allow you to plead guilty "as is" any longer. They WILL seek the amendment before you plead guilty. At that point, you may as well just run the trial. That's why I said, you should be prepared to pay the ticket at the court cashier that day before your matter gets called in court so that you don't have to plea inside court where the amendment can be made.
As for the case evidence, the officer used a laser device (which is VERY accurate) and got the reading within a short distance. So, unless the officer is new and doesn't testify very well, your odds are pretty bad to beat this charge.
Given the odds and the HUGE break you already received, I personally would just pay the ticket and avoid wasting more time. But, only you know how much time you are willing to invest in something with such horrible odds.