Very capable RC crawler. But I wanted to make it better so this is what I did.

I trimmed the tire to open up the treads. I cut the tire foam into a star pattern to make it perform like a dual density foam. I also added 1.5 oz to each front tire and .75 to the rear tires using ¼ oz wheel weights attached to the rim.

I converted the wiring to use a 2s 1100 mah battery that I had for my wltoys A979. Another fun RC. https://www.banggood.com/Wltoys-7_4V-1100mAh-20C-2S-Lipo-Battery-JST-Plug-for-A949-A959-A969-A979-118-RC-Vehicles-p-1557838.html?rmmds=myorder&cur_warehouse=CN . I still get 1 hour of crawling. When you switch to a lipo you need to move the pin connector on the ESC to the lipo slot as seen in the picture with the screwdriver pointing at it.

I also converted it to 4 wheel steer using the stock transmitter. In order to convert it I bought a servo plate to mount the servo (amazon redcat 18010), some screws, a steering linkage bar (amazon redcat 18021), a servo https://www.banggood.com/KS-3518-Digital-Servo-20KG-Waterproof-180-Metal-Gear-Large-Torque-For-RC-Robot-Arm-p-1422906.html?rmmds=search&cur_warehouse=CN, a Y servo wire https://www.banggood.com/Amass-15CM-30CM-Y-Servo-Cable-Lead-Splitter-For-JR-Spektrum-HITEC-p-993824.html?ID=3422&cur_warehouse=CN, an inline servo reverse https://www.banggood.com/3_6V-24V-Servo-Signal-Reverse-Support-High-Voltage-Compatible-for-All-Servo-p-1095486.html?rmmds=search&cur_warehouse=CN, and you either need to bend the rear side linkage bars or buy new ones so the rear tires can turn in (amazon redcat 18084). After using it for a while in 4WS with stock transmitter I have decided I want the rear to be selectable. I purchased the FlySky FS-GT5 and I use channel 4 as a thumb control, left center and right switch and it works good for me.

box was a bit smashed but overall it was a good product as it looks in the picture very happy