Dangerous Prototypes Open Source Hardware

This is with latest Iwanushka fw?

I've glanced Goot catalog that talkos gave me and spot very interesting feature. Powerful pump is half a deal, how fast it picks up its pressure is also important. So Goot promoting two-stage trigger: half-push engages the pump, full push opens up valve right in the handle, with shortest path to the tip. So pressure in the handle gains almost instantly. Neat feature.

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goto set parameters menu

if((BTicks[1].o <= 100) && (BTicks[1].n > 100)){
                        CMode=3;
                        ModeTicks=250;
                        BeepTicks=2;

tell me in which line is registered 4 seconds to display the options menu?

ModeTicks=250;, is timeout when screen times out, entire code means: each time you press button1 or button3 screen timout is reset to ModeTicks=250; if you want to know how many seconds 250ticks are check how fast timer is executed.
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My concern is firmware flow. As I remember, Sparky said there some tight timing spots and display update is blocking. I didn't explore whole firmware code, so don't know. If you sure there's no potential issues in decreasing SPI frequency, then OK. On other hand, this MCU have DMA, so maybe offload display update routine to it, shouldn't be to hard.

It is not a refresh rate, it's SPI clock.
It can be changed in PIC32MX534F064H.h, line 138 - last argument of SpiChnOpen()
higher the value, lower the clock. Formula is: BR = Fpb/(2*(fpbDiv/2-1)+1)),  Fpb is derived from system clock by dividing by 2, system clock is 80Mhz, so Fpb = 40Mhz. fpbDiv should be an even number. fpbDiv = 4 gives 40Mhz/(2*(4/2-1)+1)) = 10Mhz.
If you change SPI clock frequency, DO NOT connect any tool, any weird behavior expected.

you can debug the whole project with your changes, I want to compile and add my own tools there, or rather the 105 series of soldering iron and tweezers, dr-560a and check at two stations with different supply voltage

Does anyone have a horizontal shift solution for large displays?

Every new firmware version with bootloader doesn't seem to work for me for some reason (my UniSolder doesn't do anything at all after programming them). The standalone versions work fine though. Any ideas what could cause that?

I mean if you've got to trouble getting silicone mat or using mechanical change fixture, why insert another cartridge with bare hands? )
Making tip usage sensing is surely possible, impossible to make it work reliably. A lot of testing with various tools and tips should be involved, to much of a trouble for a non critical function.

vulkan35, what's your concern? Get the code and close it?
It's a good practice not to spread messed up code.

Making it pure AC (like original JBC stations) would require complete rework of power stage and current sensing, and maybe even impossible to implement support for some irons. Sparky uses DC approach just because it's simpler to implement.

looks like I goofed up email again: iwanushka[at]gmail.com

made a mistake in paypal address and for some reason can't edit post,

Correct details: paypalme link: https://paypal.me/MPranukevicius?locale.x=en_US or use email iwanushka[at]paypal.com